623661040 has 20 divisors (see below), whose sum is σ = 1450012104. Its totient is φ = 249464384.

The previous prime is 623661029. The next prime is 623661053. The reversal of 623661040 is 40166326.

623661040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3897802 + ... + 3897961.

Almost surely, 2^623661040 is an apocalyptic number.

It is an amenable number.

623661040 is an abundant number, since it is smaller than the sum of its proper divisors (826351064).

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

623661040 is a wasteful number, since it uses less digits than its factorization.

623661040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7795776 (or 7795770 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 623661040 is about 24973.2064421051. The cubic root of 623661040 is about 854.3769796409.

It can be divided in two parts, 6236 and 61040, that added together give a palindrome (67276).

The spelling of 623661040 in words is "six hundred twenty-three million, six hundred sixty-one thousand, forty".