64842920 has 32 divisors (see below), whose sum is σ = 147661920. Its totient is φ = 25623360.

The previous prime is 64842893. The next prime is 64842937. The reversal of 64842920 is 2924846.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6446 + ... + 13085.

It is an arithmetic number, because the mean of its divisors is an integer number (4614435).

Almost surely, 2^64842920 is an apocalyptic number.

It is an amenable number.

64842920 is an abundant number, since it is smaller than the sum of its proper divisors (82819000).

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

64842920 is a wasteful number, since it uses less digits than its factorization.

64842920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19625 (or 19621 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 64842920 is about 8052.5101676434. The cubic root of 64842920 is about 401.7484296821.

The spelling of 64842920 in words is "sixty-four million, eight hundred forty-two thousand, nine hundred twenty".