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90906 = 23109139
BaseRepresentation
bin10110001100011010
311121200220
4112030122
510402111
61540510
7526014
oct261432
9147626
1090906
1162332
1244736
13324ba
14251b4
151be06
hex1631a

90906 has 16 divisors (see below), whose sum is σ = 184800. Its totient is φ = 29808.

The previous prime is 90901. The next prime is 90907. The reversal of 90906 is 60909.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585 + ... + 723.

It is an arithmetic number, because the mean of its divisors is an integer number (11550).

290906 is an apocalyptic number.

90906 is an abundant number, since it is smaller than the sum of its proper divisors (93894).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92400).

90906 is a wasteful number, since it uses less digits than its factorization.

90906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 90906 is about 301.5062188413. The cubic root of 90906 is about 44.9639216996.

The spelling of 90906 in words is "ninety thousand, nine hundred six".

Divisors: 1 2 3 6 109 139 218 278 327 417 654 834 15151 30302 45453 90906