64394457 has 16 divisors (see below), whose sum is σ = 90037248. Its totient is φ = 40859280.

The previous prime is 64394441. The next prime is 64394459. The reversal of 64394457 is 75449346.

It is not a de Polignac number, because 64394457 - 2⁴ = 64394441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64394459) 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, 12348 + ... + 16770.

It is an arithmetic number, because the mean of its divisors is an integer number (5627328).

Almost surely, 2^64394457 is an apocalyptic number.

It is an amenable number.

64394457 is a deficient number, since it is larger than the sum of its proper divisors (25642791).

64394457 is a wasteful number, since it uses less digits than its factorization.

64394457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4660.

The product of its digits is 362880, while the sum is 42.

The square root of 64394457 is about 8024.6156917325. The cubic root of 64394457 is about 400.8201028459.

The spelling of 64394457 in words is "sixty-four million, three hundred ninety-four thousand, four hundred fifty-seven".