398923991522 has 8 divisors (see below), whose sum is σ = 683869699776. Its totient is φ = 170967424932.

The previous prime is 398923991519. The next prime is 398923991539. The reversal of 398923991522 is 225199329893.

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, 14247285398 + ... + 14247285425.

It is an arithmetic number, because the mean of its divisors is an integer number (85483712472).

Almost surely, 2^398923991522 is an apocalyptic number.

398923991522 is a deficient number, since it is larger than the sum of its proper divisors (284945708254).

398923991522 is a wasteful number, since it uses less digits than its factorization.

398923991522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28494570832.

The product of its digits is 18895680, while the sum is 62.

The spelling of 398923991522 in words is "three hundred ninety-eight billion, nine hundred twenty-three million, nine hundred ninety-one thousand, five hundred twenty-two".