398790154 has 16 divisors (see below), whose sum is σ = 684389376. Its totient is φ = 170722800.

The previous prime is 398790143. The next prime is 398790157. The reversal of 398790154 is 451097893.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (398790157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1962 + ... + 28309.

It is an arithmetic number, because the mean of its divisors is an integer number (42774336).

Almost surely, 2^398790154 is an apocalyptic number.

398790154 is a deficient number, since it is larger than the sum of its proper divisors (285599222).

398790154 is a wasteful number, since it uses less digits than its factorization.

398790154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31221.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 398790154 is about 19969.7309446071. The cubic root of 398790154 is about 736.0626977247.

The spelling of 398790154 in words is "three hundred ninety-eight million, seven hundred ninety thousand, one hundred fifty-four".