398728612 has 6 divisors (see below), whose sum is σ = 697775078. Its totient is φ = 199364304.

The previous prime is 398728579. The next prime is 398728639. The reversal of 398728612 is 216827893.

It can be written as a sum of positive squares in only one way, i.e., 234273636 + 164454976 = 15306^2 + 12824^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49841073 + ... + 49841080.

Almost surely, 2^398728612 is an apocalyptic number.

It is an amenable number.

398728612 is a deficient number, since it is larger than the sum of its proper divisors (299046466).

398728612 is a wasteful number, since it uses less digits than its factorization.

398728612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99682157 (or 99682155 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 398728612 is about 19968.1900031024. The cubic root of 398728612 is about 736.0248322789.

It can be divided in two parts, 39872 and 8612, that added together give a palindrome (48484).

The spelling of 398728612 in words is "three hundred ninety-eight million, seven hundred twenty-eight thousand, six hundred twelve".