397940898 has 16 divisors (see below), whose sum is σ = 796985280. Its totient is φ = 132463056.

The previous prime is 397940867. The next prime is 397940923. The reversal of 397940898 is 898049793.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41253 + ... + 49976.

It is an arithmetic number, because the mean of its divisors is an integer number (49811580).

Almost surely, 2^397940898 is an apocalyptic number.

397940898 is an abundant number, since it is smaller than the sum of its proper divisors (399044382).

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

397940898 is a wasteful number, since it uses less digits than its factorization.

397940898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91961.

The product of its (nonzero) digits is 3919104, while the sum is 57.

The square root of 397940898 is about 19948.4560304802. The cubic root of 397940898 is about 735.5398246300.

The spelling of 397940898 in words is "three hundred ninety-seven million, nine hundred forty thousand, eight hundred ninety-eight".