63971880 has 64 divisors (see below), whose sum is σ = 219335040. Its totient is φ = 14621952.

The previous prime is 63971863. The next prime is 63971881. The reversal of 63971880 is 8817936.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (63971881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37239 + ... + 38918.

It is an arithmetic number, because the mean of its divisors is an integer number (3427110).

Almost surely, 2^63971880 is an apocalyptic number.

63971880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63971880 is an abundant number, since it is smaller than the sum of its proper divisors (155363160).

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

63971880 is a wasteful number, since it uses less digits than its factorization.

63971880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76178 (or 76174 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 63971880 is about 7998.2423069072. The cubic root of 63971880 is about 399.9414080846.

It can be divided in two parts, 639 and 71880, that multiplied together give a triangular number (45931320 = T₉₅₈₄).

The spelling of 63971880 in words is "sixty-three million, nine hundred seventy-one thousand, eight hundred eighty".