398444730 has 32 divisors (see below), whose sum is σ = 956793600. Its totient is φ = 106193472.

The previous prime is 398444719. The next prime is 398444743. The reversal of 398444730 is 37444893.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 99711 + ... + 103629.

It is an arithmetic number, because the mean of its divisors is an integer number (29899800).

Almost surely, 2^398444730 is an apocalyptic number.

398444730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398444730 is an abundant number, since it is smaller than the sum of its proper divisors (558348870).

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

398444730 is a wasteful number, since it uses less digits than its factorization.

398444730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7318.

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 398444730 is about 19961.0803815826. The cubic root of 398444730 is about 735.8501154398.

The spelling of 398444730 in words is "three hundred ninety-eight million, four hundred forty-four thousand, seven hundred thirty".