63720370 has 32 divisors (see below), whose sum is σ = 132938496. Its totient is φ = 21537600.

The previous prime is 63720347. The next prime is 63720409. The reversal of 63720370 is 7302736.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1441 + ... + 11380.

It is an arithmetic number, because the mean of its divisors is an integer number (4154328).

Almost surely, 2^63720370 is an apocalyptic number.

63720370 is an abundant number, since it is smaller than the sum of its proper divisors (69218126).

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

63720370 is a wasteful number, since it uses less digits than its factorization.

63720370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12906.

The product of its (nonzero) digits is 5292, while the sum is 28.

The square root of 63720370 is about 7982.5039931089. The cubic root of 63720370 is about 399.4165869868.

The spelling of 63720370 in words is "sixty-three million, seven hundred twenty thousand, three hundred seventy".