398253922 has 8 divisors (see below), whose sum is σ = 651688272. Its totient is φ = 181024500.

The previous prime is 398253853. The next prime is 398253937. The reversal of 398253922 is 229352893.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 9051204 + ... + 9051247.

It is an arithmetic number, because the mean of its divisors is an integer number (81461034).

Almost surely, 2^398253922 is an apocalyptic number.

398253922 is a deficient number, since it is larger than the sum of its proper divisors (253434350).

398253922 is a wasteful number, since it uses less digits than its factorization.

398253922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18102464.

The product of its digits is 233280, while the sum is 43.

The square root of 398253922 is about 19956.3003084239. The cubic root of 398253922 is about 735.7326348987.

The spelling of 398253922 in words is "three hundred ninety-eight million, two hundred fifty-three thousand, nine hundred twenty-two".