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91690434 = 23311163947
BaseRepresentation
bin1010111011100…
…01010111000010
320101112100122000
411131301113002
5141433043214
613033124430
72162233023
oct535612702
9211470560
1091690434
1147836420
1226859716
1315cc44c4
14c26ac4a
1580b2809
hex57715c2

91690434 has 64 divisors (see below), whose sum is σ = 223879680. Its totient is φ = 27585360.

The previous prime is 91690433. The next prime is 91690441. The reversal of 91690434 is 43409619.

It is not an unprimeable number, because it can be changed into a prime (91690433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96349 + ... + 97295.

It is an arithmetic number, because the mean of its divisors is an integer number (3498120).

Almost surely, 291690434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91690434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111939840).

91690434 is an abundant number, since it is smaller than the sum of its proper divisors (132189246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91690434 is a wasteful number, since it uses less digits than its factorization.

91690434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1126 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 91690434 is about 9575.5122056212. The cubic root of 91690434 is about 450.9288370404.

The spelling of 91690434 in words is "ninety-one million, six hundred ninety thousand, four hundred thirty-four".

Divisors: 1 2 3 6 9 11 18 22 27 33 54 66 99 163 198 297 326 489 594 947 978 1467 1793 1894 2841 2934 3586 4401 5379 5682 8523 8802 10417 10758 16137 17046 20834 25569 31251 32274 48411 51138 62502 93753 96822 154361 187506 281259 308722 463083 562518 926166 1389249 1697971 2778498 3395942 4167747 5093913 8335494 10187826 15281739 30563478 45845217 91690434