64401628 has 12 divisors (see below), whose sum is σ = 113065120. Its totient is φ = 32097312.

The previous prime is 64401613. The next prime is 64401637. The reversal of 64401628 is 82610446.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 64401628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24468 + ... + 26971.

Almost surely, 2^64401628 is an apocalyptic number.

It is an amenable number.

64401628 is a deficient number, since it is larger than the sum of its proper divisors (48663492).

64401628 is a wasteful number, since it uses less digits than its factorization.

64401628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51756 (or 51754 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 64401628 is about 8025.0624919685. The cubic root of 64401628 is about 400.8349808048.

The spelling of 64401628 in words is "sixty-four million, four hundred one thousand, six hundred twenty-eight".