398158927 has 8 divisors (see below), whose sum is σ = 419592960. Its totient is φ = 376772760.

The previous prime is 398158919. The next prime is 398158931. The reversal of 398158927 is 729851893.

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

It is a cyclic number.

It is not a de Polignac number, because 398158927 - 2³ = 398158919 is a prime.

It is a super-2 number, since 2×398158927² = 317061062299582658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398158987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5808 + ... + 28810.

It is an arithmetic number, because the mean of its divisors is an integer number (52449120).

Almost surely, 2^398158927 is an apocalyptic number.

398158927 is a deficient number, since it is larger than the sum of its proper divisors (21434033).

398158927 is a wasteful number, since it uses less digits than its factorization.

398158927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23933.

The product of its digits is 1088640, while the sum is 52.

The square root of 398158927 is about 19953.9200910498. The cubic root of 398158927 is about 735.6741324580.

The spelling of 398158927 in words is "three hundred ninety-eight million, one hundred fifty-eight thousand, nine hundred twenty-seven".