398000039550 has 48 divisors (see below), whose sum is σ = 987097201200. Its totient is φ = 106127203840.

The previous prime is 398000039513. The next prime is 398000039579. The reversal of 398000039550 is 55930000893.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2911126 + ... + 3044774.

It is an arithmetic number, because the mean of its divisors is an integer number (20564525025).

Almost surely, 2^398000039550 is an apocalyptic number.

398000039550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398000039550 is an abundant number, since it is smaller than the sum of its proper divisors (589097161650).

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

398000039550 is a wasteful number, since it uses less digits than its factorization.

398000039550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153517 (or 153512 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 42.

The spelling of 398000039550 in words is "three hundred ninety-eight billion, thirty-nine thousand, five hundred fifty".