64426988 has 6 divisors (see below), whose sum is σ = 112747236. Its totient is φ = 32213492.

The previous prime is 64426987. The next prime is 64427003. The reversal of 64426988 is 88962446.

It is a super-5 number, since 5×64426988⁵ (a number of 40 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (64426987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8053370 + ... + 8053377.

It is an arithmetic number, because the mean of its divisors is an integer number (18791206).

Almost surely, 2^64426988 is an apocalyptic number.

It is an amenable number.

64426988 is a deficient number, since it is larger than the sum of its proper divisors (48320248).

64426988 is a wasteful number, since it uses less digits than its factorization.

64426988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16106751 (or 16106749 counting only the distinct ones).

The product of its digits is 663552, while the sum is 47.

The square root of 64426988 is about 8026.6423864528. The cubic root of 64426988 is about 400.8875873483.

The spelling of 64426988 in words is "sixty-four million, four hundred twenty-six thousand, nine hundred eighty-eight".