398601264 has 20 divisors (see below), whose sum is σ = 1029720056. Its totient is φ = 132867072.

The previous prime is 398601263. The next prime is 398601289. The reversal of 398601264 is 462106893.

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

It is not an unprimeable number, because it can be changed into a prime (398601263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4152049 + ... + 4152144.

Almost surely, 2^398601264 is an apocalyptic number.

It is an amenable number.

398601264 is an abundant number, since it is smaller than the sum of its proper divisors (631118792).

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

398601264 is a wasteful number, since it uses less digits than its factorization.

398601264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8304204 (or 8304198 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 398601264 is about 19965.0009767092. Note that the first 3 decimals coincide. The cubic root of 398601264 is about 735.9464654666.

Subtracting from 398601264 its sum of digits (39), we obtain a square (398601225 = 19965²).

It can be divided in two parts, 3986012 and 64, that added together give a triangular number (3986076 = T₂₈₂₃).

The spelling of 398601264 in words is "three hundred ninety-eight million, six hundred one thousand, two hundred sixty-four".