393722064 has 30 divisors (see below), whose sum is σ = 1101875346. Its totient is φ = 131240640.

The previous prime is 393722053. The next prime is 393722089. The reversal of 393722064 is 460227393.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 247118400 + 146603664 = 15720^2 + 12108^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1366947 + ... + 1367234.

Almost surely, 2^393722064 is an apocalyptic number.

It is an amenable number.

393722064 is an abundant number, since it is smaller than the sum of its proper divisors (708153282).

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

393722064 is a wasteful number, since it uses less digits than its factorization.

393722064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2734195 (or 2734186 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 393722064 is about 19842.4308994639. The cubic root of 393722064 is about 732.9312701437.

The spelling of 393722064 in words is "three hundred ninety-three million, seven hundred twenty-two thousand, sixty-four".