64399370 has 32 divisors (see below), whose sum is σ = 132772608. Its totient is φ = 22030848.

The previous prime is 64399331. The next prime is 64399381. The reversal of 64399370 is 7399346.

It is a zygodrome in base 4.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46427 + ... + 47793.

It is an arithmetic number, because the mean of its divisors is an integer number (4149144).

Almost surely, 2^64399370 is an apocalyptic number.

64399370 is an abundant number, since it is smaller than the sum of its proper divisors (68373238).

64399370 is a wasteful number, since it uses less digits than its factorization.

64399370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054.

The product of its (nonzero) digits is 122472, while the sum is 41.

The square root of 64399370 is about 8024.9218064726. The cubic root of 64399370 is about 400.8302961615.

The spelling of 64399370 in words is "sixty-four million, three hundred ninety-nine thousand, three hundred seventy".