398149678 has 16 divisors (see below), whose sum is σ = 617025024. Its totient is φ = 192485880.

The previous prime is 398149663. The next prime is 398149681. The reversal of 398149678 is 876941893.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98901 + ... + 102847.

It is an arithmetic number, because the mean of its divisors is an integer number (38564064).

Almost surely, 2^398149678 is an apocalyptic number.

398149678 is a deficient number, since it is larger than the sum of its proper divisors (218875346).

398149678 is a wasteful number, since it uses less digits than its factorization.

398149678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5607.

The product of its digits is 2612736, while the sum is 55.

The square root of 398149678 is about 19953.6883307322. The cubic root of 398149678 is about 735.6684359866.

The spelling of 398149678 in words is "three hundred ninety-eight million, one hundred forty-nine thousand, six hundred seventy-eight".