64394670 has 16 divisors (see below), whose sum is σ = 154547280. Its totient is φ = 17171904.

The previous prime is 64394663. The next prime is 64394767. The reversal of 64394670 is 7649346.

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, 1073215 + ... + 1073274.

It is an arithmetic number, because the mean of its divisors is an integer number (9659205).

Almost surely, 2^64394670 is an apocalyptic number.

64394670 is an abundant number, since it is smaller than the sum of its proper divisors (90152610).

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

64394670 is a wasteful number, since it uses less digits than its factorization.

64394670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146499.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 64394670 is about 8024.6289633852. The cubic root of 64394670 is about 400.8205447813.

The spelling of 64394670 in words is "sixty-four million, three hundred ninety-four thousand, six hundred seventy".