398456958 has 16 divisors (see below), whose sum is σ = 797132160. Its totient is φ = 132782616.

The previous prime is 398456953. The next prime is 398456987. The reversal of 398456958 is 859654893.

It is a super-2 number, since 2×398456958² = 317535894757227528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 398456898 and 398456907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398456951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23791 + ... + 36917.

It is an arithmetic number, because the mean of its divisors is an integer number (49820760).

Almost surely, 2^398456958 is an apocalyptic number.

398456958 is an abundant number, since it is smaller than the sum of its proper divisors (398675202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398456958 is a wasteful number, since it uses less digits than its factorization.

398456958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18191.

The product of its digits is 9331200, while the sum is 57.

The square root of 398456958 is about 19961.3866752788. The cubic root of 398456958 is about 735.8576429440.

The spelling of 398456958 in words is "three hundred ninety-eight million, four hundred fifty-six thousand, nine hundred fifty-eight".