64087944 has 16 divisors (see below), whose sum is σ = 160219920. Its totient is φ = 21362640.

The previous prime is 64087901. The next prime is 64087957. The reversal of 64087944 is 44978046.

It is a super-2 number, since 2×64087944² = 8214529132294272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64087896 and 64087905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1335142 + ... + 1335189.

It is an arithmetic number, because the mean of its divisors is an integer number (10013745).

Almost surely, 2^64087944 is an apocalyptic number.

It is an amenable number.

64087944 is an abundant number, since it is smaller than the sum of its proper divisors (96131976).

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

64087944 is a wasteful number, since it uses less digits than its factorization.

64087944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670340 (or 2670336 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 64087944 is about 8005.4946130767. The cubic root of 64087944 is about 400.1831328098.

The spelling of 64087944 in words is "sixty-four million, eighty-seven thousand, nine hundred forty-four".