64220379 has 16 divisors (see below), whose sum is σ = 87671040. Its totient is φ = 41801760.

The previous prime is 64220369. The next prime is 64220411. The reversal of 64220379 is 97302246.

It is a de Polignac number, because none of the positive numbers 2^k-64220379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64220369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26634 + ... + 28944.

It is an arithmetic number, because the mean of its divisors is an integer number (5479440).

Almost surely, 2^64220379 is an apocalyptic number.

64220379 is a deficient number, since it is larger than the sum of its proper divisors (23450661).

64220379 is a wasteful number, since it uses less digits than its factorization.

64220379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 64220379 is about 8013.7618507166. The cubic root of 64220379 is about 400.4585969379.

The spelling of 64220379 in words is "sixty-four million, two hundred twenty thousand, three hundred seventy-nine".