90642736 has 20 divisors (see below), whose sum is σ = 176607000. Its totient is φ = 45066752.

The previous prime is 90642731. The next prime is 90642763. The reversal of 90642736 is 63724609.

It is a super-2 number, since 2×90642736² = 16432211179131392, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90642695 and 90642704.

It is not an unprimeable number, because it can be changed into a prime (90642731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12961 + ... + 18688.

It is an arithmetic number, because the mean of its divisors is an integer number (8830350).

Almost surely, 2^90642736 is an apocalyptic number.

It is an amenable number.

90642736 is a deficient number, since it is larger than the sum of its proper divisors (85964264).

90642736 is a wasteful number, since it uses less digits than its factorization.

90642736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31836 (or 31830 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 90642736 is about 9520.6478771142. The cubic root of 90642736 is about 449.2047452218.

It can be divided in two parts, 90642 and 736, that added together give a triangular number (91378 = T₄₂₇).

The spelling of 90642736 in words is "ninety million, six hundred forty-two thousand, seven hundred thirty-six".