398091212 has 12 divisors (see below), whose sum is σ = 719132736. Its totient is φ = 192624720.

The previous prime is 398091163. The next prime is 398091247. The reversal of 398091212 is 212190893.

It is a super-2 number, since 2×398091212² = 316953226143257888, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1605083 + ... + 1605330.

It is an arithmetic number, because the mean of its divisors is an integer number (59927728).

Almost surely, 2^398091212 is an apocalyptic number.

It is an amenable number.

398091212 is a deficient number, since it is larger than the sum of its proper divisors (321041524).

398091212 is a wasteful number, since it uses less digits than its factorization.

398091212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210448 (or 3210446 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 398091212 is about 19952.2232345170. The cubic root of 398091212 is about 735.6324246583.

The spelling of 398091212 in words is "three hundred ninety-eight million, ninety-one thousand, two hundred twelve".