623456040 has 32 divisors (see below), whose sum is σ = 1870368480. Its totient is φ = 166254912.

The previous prime is 623456023. The next prime is 623456047. The reversal of 623456040 is 40654326.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 623455989 and 623456007.

It is not an unprimeable number, because it can be changed into a prime (623456047) 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 7 ways as a sum of consecutive naturals, for example, 2597614 + ... + 2597853.

It is an arithmetic number, because the mean of its divisors is an integer number (58449015).

Almost surely, 2^623456040 is an apocalyptic number.

623456040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

623456040 is an abundant number, since it is smaller than the sum of its proper divisors (1246912440).

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

623456040 is a wasteful number, since it uses less digits than its factorization.

623456040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5195481 (or 5195477 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 623456040 is about 24969.1017059084. The cubic root of 623456040 is about 854.2833569497.

The spelling of 623456040 in words is "six hundred twenty-three million, four hundred fifty-six thousand, forty".