64220386 has 8 divisors (see below), whose sum is σ = 97183404. Its totient is φ = 31825920.

The previous prime is 64220369. The next prime is 64220411. The reversal of 64220386 is 68302246.

It can be written as a sum of positive squares in 2 ways, for example, as 48372025 + 15848361 = 6955^2 + 3981^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 141855 + ... + 142306.

Almost surely, 2^64220386 is an apocalyptic number.

64220386 is a deficient number, since it is larger than the sum of its proper divisors (32963018).

64220386 is a wasteful number, since it uses less digits than its factorization.

64220386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284276.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 64220386 is about 8013.7622874652. The cubic root of 64220386 is about 400.4586114878.

The spelling of 64220386 in words is "sixty-four million, two hundred twenty thousand, three hundred eighty-six".