398711975 has 12 divisors (see below), whose sum is σ = 501784104. Its totient is φ = 314207520.

The previous prime is 398711959. The next prime is 398711983. The reversal of 398711975 is 579117893.

It is not a de Polignac number, because 398711975 - 2⁴ = 398711959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117344 + ... + 120693.

It is an arithmetic number, because the mean of its divisors is an integer number (41815342).

Almost surely, 2^398711975 is an apocalyptic number.

398711975 is a deficient number, since it is larger than the sum of its proper divisors (103072129).

398711975 is a wasteful number, since it uses less digits than its factorization.

398711975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238114 (or 238109 counting only the distinct ones).

The product of its digits is 476280, while the sum is 50.

The square root of 398711975 is about 19967.7734111743. The cubic root of 398711975 is about 736.0145952279.

The spelling of 398711975 in words is "three hundred ninety-eight million, seven hundred eleven thousand, nine hundred seventy-five".