64894215 has 16 divisors (see below), whose sum is σ = 109296000. Its totient is φ = 32788512.

The previous prime is 64894187. The next prime is 64894229. The reversal of 64894215 is 51249846.

It is not a de Polignac number, because 64894215 - 2⁷ = 64894087 is a prime.

It is a super-2 number, since 2×64894215² = 8422518280932450, which contains 22 as substring.

It is a congruent number.

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, 113565 + ... + 114134.

It is an arithmetic number, because the mean of its divisors is an integer number (6831000).

Almost surely, 2^64894215 is an apocalyptic number.

64894215 is a deficient number, since it is larger than the sum of its proper divisors (44401785).

64894215 is a wasteful number, since it uses less digits than its factorization.

64894215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227726.

The product of its digits is 69120, while the sum is 39.

The square root of 64894215 is about 8055.6945696817. The cubic root of 64894215 is about 401.8543382073.

The spelling of 64894215 in words is "sixty-four million, eight hundred ninety-four thousand, two hundred fifteen".