398157946 has 16 divisors (see below), whose sum is σ = 605635200. Its totient is φ = 196286688.

The previous prime is 398157931. The next prime is 398157953. The reversal of 398157946 is 649751893.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 398157893 and 398157902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159766 + ... + 162238.

It is an arithmetic number, because the mean of its divisors is an integer number (37852200).

Almost surely, 2^398157946 is an apocalyptic number.

398157946 is a deficient number, since it is larger than the sum of its proper divisors (207477254).

398157946 is a wasteful number, since it uses less digits than its factorization.

398157946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3573.

The product of its digits is 1632960, while the sum is 52.

The square root of 398157946 is about 19953.8955093987. The cubic root of 398157946 is about 735.6735282629.

The spelling of 398157946 in words is "three hundred ninety-eight million, one hundred fifty-seven thousand, nine hundred forty-six".