63891088 has 10 divisors (see below), whose sum is σ = 123789014. Its totient is φ = 31945536.

The previous prime is 63891073. The next prime is 63891101. The reversal of 63891088 is 88019836.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 63808144 + 82944 = 7988^2 + 288^2 .

It is a super-2 number, since 2×63891088² = 8164142251647488, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996581 + ... + 1996612.

Almost surely, 2^63891088 is an apocalyptic number.

It is an amenable number.

63891088 is a deficient number, since it is larger than the sum of its proper divisors (59897926).

63891088 is a wasteful number, since it uses less digits than its factorization.

63891088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993201 (or 3993195 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 63891088 is about 7993.1901015802. The cubic root of 63891088 is about 399.7729711692.

Subtracting from 63891088 its product of nonzero digits (82944), we obtain a square (63808144 = 7988²).

The spelling of 63891088 in words is "sixty-three million, eight hundred ninety-one thousand, eighty-eight".