623732940 has 48 divisors (see below), whose sum is σ = 1940504160. Its totient is φ = 166328640.

The previous prime is 623732917. The next prime is 623732947. The reversal of 623732940 is 49237326.

It is a happy number.

623732940 is a `hidden beast` number, since 623 + 7 + 3 + 29 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 623732895 and 623732904.

It is not an unprimeable number, because it can be changed into a prime (623732947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 576991 + ... + 578070.

It is an arithmetic number, because the mean of its divisors is an integer number (40427170).

Almost surely, 2^623732940 is an apocalyptic number.

623732940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

623732940 is an abundant number, since it is smaller than the sum of its proper divisors (1316771220).

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

623732940 is a wasteful number, since it uses less digits than its factorization.

623732940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155079 (or 1155071 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 623732940 is about 24974.6459434363. The cubic root of 623732940 is about 854.4098112274.

The spelling of 623732940 in words is "six hundred twenty-three million, seven hundred thirty-two thousand, nine hundred forty".