90640036 has 12 divisors (see below), whose sum is σ = 158710860. Its totient is φ = 45294080.

The previous prime is 90640031. The next prime is 90640049. The reversal of 90640036 is 63004609.

It can be written as a sum of positive squares in 2 ways, for example, as 15054400 + 75585636 = 3880^2 + 8694^2 .

It is a super-2 number, since 2×90640036² = 16431232252162592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90639986 and 90640013.

It is not an unprimeable number, because it can be changed into a prime (90640031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2880 + ... + 13768.

It is an arithmetic number, because the mean of its divisors is an integer number (13225905).

Almost surely, 2^90640036 is an apocalyptic number.

It is an amenable number.

90640036 is a deficient number, since it is larger than the sum of its proper divisors (68070824).

90640036 is a wasteful number, since it uses less digits than its factorization.

90640036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12974 (or 12972 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 90640036 is about 9520.5060789855. The cubic root of 90640036 is about 449.2002849826.

The spelling of 90640036 in words is "ninety million, six hundred forty thousand, thirty-six".