64237928 has 16 divisors (see below), whose sum is σ = 120929760. Its totient is φ = 31990000.

The previous prime is 64237913. The next prime is 64237937. The reversal of 64237928 is 82973246.

It is a happy number.

It is a super-2 number, since 2×64237928² = 8253022787466368, which contains 22 as substring.

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, 13988 + ... + 18003.

It is an arithmetic number, because the mean of its divisors is an integer number (7558110).

Almost surely, 2^64237928 is an apocalyptic number.

It is an amenable number.

64237928 is a deficient number, since it is larger than the sum of its proper divisors (56691832).

64237928 is a wasteful number, since it uses less digits than its factorization.

64237928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32248 (or 32244 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 64237928 is about 8014.8567048950. The cubic root of 64237928 is about 400.4950703439.

The spelling of 64237928 in words is "sixty-four million, two hundred thirty-seven thousand, nine hundred twenty-eight".