64421876 has 12 divisors (see below), whose sum is σ = 116626020. Its totient is φ = 31100160.

The previous prime is 64421809. The next prime is 64421879. The reversal of 64421876 is 67812446.

It can be written as a sum of positive squares in 2 ways, for example, as 24403600 + 40018276 = 4940^2 + 6326^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64421879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277565 + ... + 277796.

It is an arithmetic number, because the mean of its divisors is an integer number (9718835).

Almost surely, 2^64421876 is an apocalyptic number.

It is an amenable number.

64421876 is a deficient number, since it is larger than the sum of its proper divisors (52204144).

64421876 is a wasteful number, since it uses less digits than its factorization.

64421876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555394 (or 555392 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 64421876 is about 8026.3239406343. The cubic root of 64421876 is about 400.8769841750.

The spelling of 64421876 in words is "sixty-four million, four hundred twenty-one thousand, eight hundred seventy-six".