398120986 has 8 divisors (see below), whose sum is σ = 600757920. Its totient is φ = 197868348.

The previous prime is 398120971. The next prime is 398121023. The reversal of 398120986 is 689021893.

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

It is a super-2 number, since 2×398120986² = 317000638987224392, which contains 22 as substring.

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, 595656 + ... + 596323.

It is an arithmetic number, because the mean of its divisors is an integer number (75094740).

Almost surely, 2^398120986 is an apocalyptic number.

398120986 is a deficient number, since it is larger than the sum of its proper divisors (202636934).

398120986 is a wasteful number, since it uses less digits than its factorization.

398120986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192148.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 398120986 is about 19952.9693529560. The cubic root of 398120986 is about 735.6507639845.

The spelling of 398120986 in words is "three hundred ninety-eight million, one hundred twenty thousand, nine hundred eighty-six".