64791020 has 48 divisors (see below), whose sum is σ = 156377088. Its totient is φ = 22088640.

The previous prime is 64790993. The next prime is 64791031. The reversal of 64791020 is 2019746.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25529 + ... + 27951.

It is an arithmetic number, because the mean of its divisors is an integer number (3257856).

Almost surely, 2^64791020 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 64791020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78188544).

64791020 is an abundant number, since it is smaller than the sum of its proper divisors (91586068).

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

64791020 is a wasteful number, since it uses less digits than its factorization.

64791020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630 (or 2628 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 64791020 is about 8049.2869249394. The cubic root of 64791020 is about 401.6412151555.

The spelling of 64791020 in words is "sixty-four million, seven hundred ninety-one thousand, twenty".