623477840 has 20 divisors (see below), whose sum is σ = 1449586164. Its totient is φ = 249391104.

The previous prime is 623477809. The next prime is 623477843. The reversal of 623477840 is 48774326.

It can be written as a sum of positive squares in 2 ways, for example, as 290634304 + 332843536 = 17048^2 + 18244^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623477843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3896657 + ... + 3896816.

Almost surely, 2^623477840 is an apocalyptic number.

It is an amenable number.

623477840 is an abundant number, since it is smaller than the sum of its proper divisors (826108324).

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

623477840 is a wasteful number, since it uses less digits than its factorization.

623477840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7793486 (or 7793480 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 41.

The square root of 623477840 is about 24969.5382416255. The cubic root of 623477840 is about 854.2933138987.

The spelling of 623477840 in words is "six hundred twenty-three million, four hundred seventy-seven thousand, eight hundred forty".