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75092020 = 22529129469
BaseRepresentation
bin1000111100111…
…01000000110100
312020022001212221
410132131000310
5123210421040
611241252124
71601162113
oct436350064
9166261787
1075092020
1139429823
1221194044
1312732463
149d89c7a
1568d474a
hex479d034

75092020 has 24 divisors (see below), whose sum is σ = 163132200. Its totient is φ = 29000832.

The previous prime is 75091993. The next prime is 75092021. The reversal of 75092020 is 2029057.

It can be written as a sum of positive squares in 4 ways, for example, as 649636 + 74442384 = 806^2 + 8628^2 .

It is a super-2 number, since 2×750920202 = 11277622935360800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75092021) 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, 64155 + ... + 65314.

It is an arithmetic number, because the mean of its divisors is an integer number (6797175).

Almost surely, 275092020 is an apocalyptic number.

It is an amenable number.

75092020 is an abundant number, since it is smaller than the sum of its proper divisors (88040180).

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

75092020 is a wasteful number, since it uses less digits than its factorization.

75092020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129507 (or 129505 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 75092020 is about 8665.5651864146. The cubic root of 75092020 is about 421.8887347700. Note that the first 3 decimals are identical.

The spelling of 75092020 in words is "seventy-five million, ninety-two thousand, twenty".

Divisors: 1 2 4 5 10 20 29 58 116 145 290 580 129469 258938 517876 647345 1294690 2589380 3754601 7509202 15018404 18773005 37546010 75092020