398294740 has 12 divisors (see below), whose sum is σ = 836418996. Its totient is φ = 159317888.

The previous prime is 398294737. The next prime is 398294773. The reversal of 398294740 is 47492893.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 96786244 + 301508496 = 9838^2 + 17364^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9957349 + ... + 9957388.

It is an arithmetic number, because the mean of its divisors is an integer number (69701583).

Almost surely, 2^398294740 is an apocalyptic number.

It is an amenable number.

398294740 is an abundant number, since it is smaller than the sum of its proper divisors (438124256).

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

398294740 is a wasteful number, since it uses less digits than its factorization.

398294740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19914746 (or 19914744 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 398294740 is about 19957.3229667709. The cubic root of 398294740 is about 735.7577697077.

The spelling of 398294740 in words is "three hundred ninety-eight million, two hundred ninety-four thousand, seven hundred forty".