64798720 has 120 divisors (see below), whose sum is σ = 179301024. Its totient is φ = 22020096.

The previous prime is 64798717. The next prime is 64798763. The reversal of 64798720 is 2789746.

It is a super-2 number, since 2×64798720² = 8397748227276800, which contains 22 as substring.

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, 573384 + ... + 573496.

Almost surely, 2^64798720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64798720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89650512).

64798720 is an abundant number, since it is smaller than the sum of its proper divisors (114502304).

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

64798720 is an equidigital number, since it uses as much as digits as its factorization.

64798720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 64798720 is about 8049.7652139674. The cubic root of 64798720 is about 401.6571253585.

The spelling of 64798720 in words is "sixty-four million, seven hundred ninety-eight thousand, seven hundred twenty".