398374715 has 4 divisors (see below), whose sum is σ = 478049664. Its totient is φ = 318699768.

The previous prime is 398374663. The next prime is 398374723. The reversal of 398374715 is 517473893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 517473893 = 12433 ⋅41621.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398374715 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398374715.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39837467 + ... + 39837476.

It is an arithmetic number, because the mean of its divisors is an integer number (119512416).

Almost surely, 2^398374715 is an apocalyptic number.

398374715 is a deficient number, since it is larger than the sum of its proper divisors (79674949).

398374715 is an equidigital number, since it uses as much as digits as its factorization.

398374715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79674948.

The product of its digits is 635040, while the sum is 47.

The square root of 398374715 is about 19959.3265166939. The cubic root of 398374715 is about 735.8070115411.

The spelling of 398374715 in words is "three hundred ninety-eight million, three hundred seventy-four thousand, seven hundred fifteen".