64642826 has 12 divisors (see below), whose sum is σ = 102337362. Its totient is φ = 30619944.

The previous prime is 64642771. The next prime is 64642829. The reversal of 64642826 is 62824646.

It can be written as a sum of positive squares in only one way, i.e., 38130625 + 26512201 = 6175^2 + 5149^2 .

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 64642826.

It is not an unprimeable number, because it can be changed into a prime (64642829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44045 + ... + 45488.

Almost surely, 2^64642826 is an apocalyptic number.

64642826 is a deficient number, since it is larger than the sum of its proper divisors (37694536).

64642826 is a wasteful number, since it uses less digits than its factorization.

64642826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89573 (or 89554 counting only the distinct ones).

The product of its digits is 110592, while the sum is 38.

The square root of 64642826 is about 8040.0762434196. The cubic root of 64642826 is about 401.3347619058.

The spelling of 64642826 in words is "sixty-four million, six hundred forty-two thousand, eight hundred twenty-six".