64434880 has 28 divisors (see below), whose sum is σ = 153436320. Its totient is φ = 25773824.

The previous prime is 64434859. The next prime is 64434883. The reversal of 64434880 is 8843446.

64434880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64434880² = 8303707521228800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (64434883) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 100360 + ... + 100999.

Almost surely, 2^64434880 is an apocalyptic number.

It is an amenable number.

64434880 is an abundant number, since it is smaller than the sum of its proper divisors (89001440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64434880 is a wasteful number, since it uses less digits than its factorization.

64434880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201376 (or 201366 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The square root of 64434880 is about 8027.1339841814. The cubic root of 64434880 is about 400.9039556217.

The spelling of 64434880 in words is "sixty-four million, four hundred thirty-four thousand, eight hundred eighty".