90623040 has 56 divisors (see below), whose sum is σ = 287731200. Its totient is φ = 24165888.

The previous prime is 90623011. The next prime is 90623047. The reversal of 90623040 is 4032609.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 90623040.

It is not an unprimeable number, because it can be changed into a prime (90623047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46240 + ... + 48159.

Almost surely, 2^90623040 is an apocalyptic number.

It is an amenable number.

90623040 is an abundant number, since it is smaller than the sum of its proper divisors (197108160).

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

90623040 is a wasteful number, since it uses less digits than its factorization.

90623040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94419 (or 94409 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 90623040 is about 9519.6134375299. The cubic root of 90623040 is about 449.1722065689.

Adding to 90623040 its reverse (4032609), we get a palindrome (94655649).

The spelling of 90623040 in words is "ninety million, six hundred twenty-three thousand, forty".