64398331 has 8 divisors (see below), whose sum is σ = 66225600. Its totient is φ = 62583360.

The previous prime is 64398281. The next prime is 64398343. The reversal of 64398331 is 13389346.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64398331 is a prime.

It is a super-2 number, since 2×64398331² = 8294290071171122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64398031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8110 + ... + 13948.

It is an arithmetic number, because the mean of its divisors is an integer number (8278200).

Almost surely, 2^64398331 is an apocalyptic number.

64398331 is a deficient number, since it is larger than the sum of its proper divisors (1827269).

64398331 is a wasteful number, since it uses less digits than its factorization.

64398331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6149.

The product of its digits is 46656, while the sum is 37.

The square root of 64398331 is about 8024.8570703783. The cubic root of 64398331 is about 400.8281405249.

The spelling of 64398331 in words is "sixty-four million, three hundred ninety-eight thousand, three hundred thirty-one".