63872638 has 16 divisors (see below), whose sum is σ = 102040560. Its totient is φ = 29881216.

The previous prime is 63872609. The next prime is 63872639. The reversal of 63872638 is 83627836.

It is a junction number, because it is equal to n+sod(n) for n = 63872594 and 63872603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63872639) 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, 453 + ... + 11311.

It is an arithmetic number, because the mean of its divisors is an integer number (6377535).

Almost surely, 2^63872638 is an apocalyptic number.

63872638 is a deficient number, since it is larger than the sum of its proper divisors (38167922).

63872638 is a wasteful number, since it uses less digits than its factorization.

63872638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11051.

The product of its digits is 290304, while the sum is 43.

The square root of 63872638 is about 7992.0359108302. The cubic root of 63872638 is about 399.7344862952.

It can be divided in two parts, 6387 and 2638, that added together give a square (9025 = 95²).

The spelling of 63872638 in words is "sixty-three million, eight hundred seventy-two thousand, six hundred thirty-eight".