398172064 has 12 divisors (see below), whose sum is σ = 783901314. Its totient is φ = 199086016.

The previous prime is 398172053. The next prime is 398172083. The reversal of 398172064 is 460271893.

It can be written as a sum of positive squares in only one way, i.e., 210482064 + 187690000 = 14508^2 + 13700^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221407 + ... + 6221470.

Almost surely, 2^398172064 is an apocalyptic number.

It is an amenable number.

398172064 is a deficient number, since it is larger than the sum of its proper divisors (385729250).

398172064 is a wasteful number, since it uses less digits than its factorization.

398172064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12442887 (or 12442879 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 398172064 is about 19954.2492717717. The cubic root of 398172064 is about 735.6822234020.

The spelling of 398172064 in words is "three hundred ninety-eight million, one hundred seventy-two thousand, sixty-four".