64442871 has 28 divisors (see below), whose sum is σ = 97626760. Its totient is φ = 42515280.

The previous prime is 64442839. The next prime is 64442887. The reversal of 64442871 is 17824446.

64442871 is a `hidden beast` number, since 644 + 4 + 2 + 8 + 7 + 1 = 666.

It is not a de Polignac number, because 64442871 - 2⁵ = 64442839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64442821) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 79056 + ... + 79866.

It is an arithmetic number, because the mean of its divisors is an integer number (3486670).

Almost surely, 2^64442871 is an apocalyptic number.

64442871 is a deficient number, since it is larger than the sum of its proper divisors (33183889).

64442871 is an equidigital number, since it uses as much as digits as its factorization.

64442871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938 (or 923 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 64442871 is about 8027.6317180100. The cubic root of 64442871 is about 400.9205278627.

The spelling of 64442871 in words is "sixty-four million, four hundred forty-two thousand, eight hundred seventy-one".