64431285 has 16 divisors (see below), whose sum is σ = 103192704. Its totient is φ = 34329152.

The previous prime is 64431281. The next prime is 64431371. The reversal of 64431285 is 58213446.

It is a cyclic number.

It is not a de Polignac number, because 64431285 - 2² = 64431281 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64431281) 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, 22864 + ... + 25526.

It is an arithmetic number, because the mean of its divisors is an integer number (6449544).

Almost surely, 2^64431285 is an apocalyptic number.

It is an amenable number.

64431285 is a deficient number, since it is larger than the sum of its proper divisors (38761419).

64431285 is a wasteful number, since it uses less digits than its factorization.

64431285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4284.

The product of its digits is 23040, while the sum is 33.

The square root of 64431285 is about 8026.9100530653. The cubic root of 64431285 is about 400.8964996366.

The spelling of 64431285 in words is "sixty-four million, four hundred thirty-one thousand, two hundred eighty-five".