398878315 has 48 divisors (see below), whose sum is σ = 548743104. Its totient is φ = 277896960.

The previous prime is 398878303. The next prime is 398878321. The reversal of 398878315 is 513878893.

It is not a de Polignac number, because 398878315 - 2¹³ = 398870123 is a prime.

It is a Duffinian 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 47 ways as a sum of consecutive naturals, for example, 2305569 + ... + 2305741.

It is an arithmetic number, because the mean of its divisors is an integer number (11432148).

Almost surely, 2^398878315 is an apocalyptic number.

398878315 is a deficient number, since it is larger than the sum of its proper divisors (149864789).

398878315 is a wasteful number, since it uses less digits than its factorization.

398878315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340 (or 329 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 52.

The square root of 398878315 is about 19971.9381883682. The cubic root of 398878315 is about 736.1169344718.

The spelling of 398878315 in words is "three hundred ninety-eight million, eight hundred seventy-eight thousand, three hundred fifteen".