64293870 has 64 divisors (see below), whose sum is σ = 162155520. Its totient is φ = 16291968.

The previous prime is 64293851. The next prime is 64293917. The reversal of 64293870 is 7839246.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57739 + ... + 58841.

It is an arithmetic number, because the mean of its divisors is an integer number (2533680).

Almost surely, 2^64293870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64293870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81077760).

64293870 is an abundant number, since it is smaller than the sum of its proper divisors (97861650).

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

64293870 is a wasteful number, since it uses less digits than its factorization.

64293870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 64293870 is about 8018.3458393861. The cubic root of 64293870 is about 400.6112944884.

The spelling of 64293870 in words is "sixty-four million, two hundred ninety-three thousand, eight hundred seventy".