398915974 has 8 divisors (see below), whose sum is σ = 599089680. Its totient is φ = 199219416.

The previous prime is 398915969. The next prime is 398915983. The reversal of 398915974 is 479519893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 117189 + ... + 120544.

It is an arithmetic number, because the mean of its divisors is an integer number (74886210).

Almost surely, 2^398915974 is an apocalyptic number.

398915974 is a deficient number, since it is larger than the sum of its proper divisors (200173706).

398915974 is a wasteful number, since it uses less digits than its factorization.

398915974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238574.

The product of its digits is 2449440, while the sum is 55.

The square root of 398915974 is about 19972.8809639471. The cubic root of 398915974 is about 736.1400998953.

The spelling of 398915974 in words is "three hundred ninety-eight million, nine hundred fifteen thousand, nine hundred seventy-four".