398831374950 has 96 divisors (see below), whose sum is σ = 1016128418976. Its totient is φ = 103450613760.

The previous prime is 398831374937. The next prime is 398831374961. The reversal of 398831374950 is 59473138893.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24261934 + ... + 24278366.

It is an arithmetic number, because the mean of its divisors is an integer number (10584671031).

Almost surely, 2^398831374950 is an apocalyptic number.

398831374950 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 398831374950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508064209488).

398831374950 is an abundant number, since it is smaller than the sum of its proper divisors (617297044026).

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

398831374950 is a wasteful number, since it uses less digits than its factorization.

398831374950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20858 (or 20853 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 60.

The spelling of 398831374950 in words is "three hundred ninety-eight billion, eight hundred thirty-one million, three hundred seventy-four thousand, nine hundred fifty".