398661472 has 24 divisors (see below), whose sum is σ = 856216872. Its totient is φ = 181209600.

The previous prime is 398661469. The next prime is 398661479. The reversal of 398661472 is 274166893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398661479) 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, 565929 + ... + 566632.

It is an arithmetic number, because the mean of its divisors is an integer number (35675703).

Almost surely, 2^398661472 is an apocalyptic number.

398661472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

398661472 is an abundant number, since it is smaller than the sum of its proper divisors (457555400).

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

398661472 is a wasteful number, since it uses less digits than its factorization.

398661472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132582 (or 1132574 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 398661472 is about 19966.5087584184. The cubic root of 398661472 is about 735.9835180619.

The spelling of 398661472 in words is "three hundred ninety-eight million, six hundred sixty-one thousand, four hundred seventy-two".