63457720 has 32 divisors (see below), whose sum is σ = 150296400. Its totient is φ = 24046848.

The previous prime is 63457699. The next prime is 63457727. The reversal of 63457720 is 2775436.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63457727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40989 + ... + 42508.

Almost surely, 2^63457720 is an apocalyptic number.

It is an amenable number.

63457720 is an abundant number, since it is smaller than the sum of its proper divisors (86838680).

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

63457720 is a wasteful number, since it uses less digits than its factorization.

63457720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83527 (or 83523 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 63457720 is about 7966.0354003733. The cubic root of 63457720 is about 398.8670440568.

The spelling of 63457720 in words is "sixty-three million, four hundred fifty-seven thousand, seven hundred twenty".