64190780 has 24 divisors (see below), whose sum is σ = 135998352. Its totient is φ = 25448192.

The previous prime is 64190779. The next prime is 64190807. The reversal of 64190780 is 8709146.

It is a self number, because there is not a number n which added to its sum of digits gives 64190780.

It is a congruent number.

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, 11942 + ... + 16461.

It is an arithmetic number, because the mean of its divisors is an integer number (5666598).

Almost surely, 2^64190780 is an apocalyptic number.

It is an amenable number.

64190780 is an abundant number, since it is smaller than the sum of its proper divisors (71807572).

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

64190780 is a wasteful number, since it uses less digits than its factorization.

64190780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28525 (or 28523 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 64190780 is about 8011.9148772313. The cubic root of 64190780 is about 400.3970640533.

The spelling of 64190780 in words is "sixty-four million, one hundred ninety thousand, seven hundred eighty".