398315946 has 32 divisors (see below), whose sum is σ = 921968640. Its totient is φ = 112363056.

The previous prime is 398315941. The next prime is 398315963. The reversal of 398315946 is 649513893.

It is a junction number, because it is equal to n+sod(n) for n = 398315895 and 398315904.

It is not an unprimeable number, because it can be changed into a prime (398315941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56706 + ... + 63341.

It is an arithmetic number, because the mean of its divisors is an integer number (28811520).

Almost surely, 2^398315946 is an apocalyptic number.

398315946 is an abundant number, since it is smaller than the sum of its proper divisors (523652694).

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

398315946 is a wasteful number, since it uses less digits than its factorization.

398315946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120138.

The product of its digits is 699840, while the sum is 48.

The square root of 398315946 is about 19957.8542433800. The cubic root of 398315946 is about 735.7708272091.

The spelling of 398315946 in words is "three hundred ninety-eight million, three hundred fifteen thousand, nine hundred forty-six".