64231864 has 8 divisors (see below), whose sum is σ = 120434760. Its totient is φ = 32115928.

The previous prime is 64231829. The next prime is 64231873. The reversal of 64231864 is 46813246.

64231864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4014484 + ... + 4014499.

It is an arithmetic number, because the mean of its divisors is an integer number (15054345).

Almost surely, 2^64231864 is an apocalyptic number.

It is an amenable number.

64231864 is a deficient number, since it is larger than the sum of its proper divisors (56202896).

64231864 is a wasteful number, since it uses less digits than its factorization.

64231864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8028989 (or 8028985 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 64231864 is about 8014.4783984986. The cubic root of 64231864 is about 400.4824678280.

The spelling of 64231864 in words is "sixty-four million, two hundred thirty-one thousand, eight hundred sixty-four".