64871760 has 40 divisors (see below), whose sum is σ = 201103200. Its totient is φ = 17299072.

The previous prime is 64871759. The next prime is 64871783. The reversal of 64871760 is 6717846.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134910 + ... + 135389.

It is an arithmetic number, because the mean of its divisors is an integer number (5027580).

Almost surely, 2^64871760 is an apocalyptic number.

64871760 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64871760 is an abundant number, since it is smaller than the sum of its proper divisors (136231440).

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

64871760 is a wasteful number, since it uses less digits than its factorization.

64871760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270315 (or 270309 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 64871760 is about 8054.3007145251. The cubic root of 64871760 is about 401.8079823538.

The spelling of 64871760 in words is "sixty-four million, eight hundred seventy-one thousand, seven hundred sixty".