623606940 has 72 divisors (see below), whose sum is σ = 2063578608. Its totient is φ = 151176960.

The previous prime is 623606911. The next prime is 623606947. The reversal of 623606940 is 49606326.

623606940 is a `hidden beast` number, since 6 + 2 + 3 + 606 + 9 + 40 = 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 = 623606895 and 623606904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623606947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 155497 + ... + 159456.

It is an arithmetic number, because the mean of its divisors is an integer number (28660814).

Almost surely, 2^623606940 is an apocalyptic number.

623606940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

623606940 is an abundant number, since it is smaller than the sum of its proper divisors (1439971668).

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

623606940 is a wasteful number, since it uses less digits than its factorization.

623606940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314979 (or 314974 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 623606940 is about 24972.1232577448. The cubic root of 623606940 is about 854.3522743773.

The spelling of 623606940 in words is "six hundred twenty-three million, six hundred six thousand, nine hundred forty".