64128426 has 16 divisors (see below), whose sum is σ = 128386944. Its totient is φ = 21354464.

The previous prime is 64128397. The next prime is 64128431. The reversal of 64128426 is 62482146.

64128426 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 2×64128426² = 8224910042474952, which contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 1711 + ... + 11453.

It is an arithmetic number, because the mean of its divisors is an integer number (8024184).

Almost surely, 2^64128426 is an apocalyptic number.

64128426 is an abundant number, since it is smaller than the sum of its proper divisors (64258518).

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

64128426 is a wasteful number, since it uses less digits than its factorization.

64128426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10845.

The product of its digits is 18432, while the sum is 33.

The square root of 64128426 is about 8008.0226023657. The cubic root of 64128426 is about 400.2673754028.

The spelling of 64128426 in words is "sixty-four million, one hundred twenty-eight thousand, four hundred twenty-six".