398230742 has 24 divisors (see below), whose sum is σ = 748326096. Its totient is φ = 157541328.

The previous prime is 398230739. The next prime is 398230751. The reversal of 398230742 is 247032893.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 398230696 and 398230705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155018 + ... + 157565.

It is an arithmetic number, because the mean of its divisors is an integer number (31180254).

Almost surely, 2^398230742 is an apocalyptic number.

398230742 is a deficient number, since it is larger than the sum of its proper divisors (350095354).

398230742 is a wasteful number, since it uses less digits than its factorization.

398230742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312612 (or 312605 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 398230742 is about 19955.7195310016. The cubic root of 398230742 is about 735.7183604099.

The spelling of 398230742 in words is "three hundred ninety-eight million, two hundred thirty thousand, seven hundred forty-two".