64621422 has 32 divisors (see below), whose sum is σ = 148239360. Its totient is φ = 20845080.

The previous prime is 64621409. The next prime is 64621429. The reversal of 64621422 is 22412646.

64621422 is a `hidden beast` number, since 646 + 2 + 14 + 2 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64621429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17628 + ... + 20975.

It is an arithmetic number, because the mean of its divisors is an integer number (4632480).

Almost surely, 2^64621422 is an apocalyptic number.

64621422 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

64621422 is an abundant number, since it is smaller than the sum of its proper divisors (83617938).

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

64621422 is a wasteful number, since it uses less digits than its factorization.

64621422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38645 (or 38639 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 64621422 is about 8038.7450513124. The cubic root of 64621422 is about 401.2904614626.

The spelling of 64621422 in words is "sixty-four million, six hundred twenty-one thousand, four hundred twenty-two".