64890884 has 12 divisors (see below), whose sum is σ = 114684108. Its totient is φ = 32124000.

The previous prime is 64890863. The next prime is 64890911. The reversal of 64890884 is 48809846.

It can be written as a sum of positive squares in 2 ways, for example, as 45265984 + 19624900 = 6728^2 + 4430^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79907 + ... + 80714.

It is an arithmetic number, because the mean of its divisors is an integer number (9557009).

Almost surely, 2^64890884 is an apocalyptic number.

It is an amenable number.

64890884 is a deficient number, since it is larger than the sum of its proper divisors (49793224).

64890884 is a wasteful number, since it uses less digits than its factorization.

64890884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160726 (or 160724 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 64890884 is about 8055.4878188723. The cubic root of 64890884 is about 401.8474624033.

The spelling of 64890884 in words is "sixty-four million, eight hundred ninety thousand, eight hundred eighty-four".