398269656 has 64 divisors (see below), whose sum is σ = 1154419200. Its totient is φ = 126982944.

The previous prime is 398269649. The next prime is 398269657. The reversal of 398269656 is 656962893.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398269657) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 35116 + ... + 45051.

It is an arithmetic number, because the mean of its divisors is an integer number (18037800).

Almost surely, 2^398269656 is an apocalyptic number.

398269656 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

398269656 is an abundant number, since it is smaller than the sum of its proper divisors (756149544).

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

398269656 is a wasteful number, since it uses less digits than its factorization.

398269656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80205 (or 80195 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 398269656 is about 19956.6945158761. The cubic root of 398269656 is about 735.7423237464.

The spelling of 398269656 in words is "three hundred ninety-eight million, two hundred sixty-nine thousand, six hundred fifty-six".