398800155 has 16 divisors (see below), whose sum is σ = 687163680. Its totient is φ = 196332288.

The previous prime is 398800117. The next prime is 398800163. The reversal of 398800155 is 551008893.

It is not a de Polignac number, because 398800155 - 2¹⁴ = 398783771 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1022370 + ... + 1022759.

It is an arithmetic number, because the mean of its divisors is an integer number (42947730).

Almost surely, 2^398800155 is an apocalyptic number.

398800155 is a deficient number, since it is larger than the sum of its proper divisors (288363525).

398800155 is a wasteful number, since it uses less digits than its factorization.

398800155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045150.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 398800155 is about 19969.9813470118. The cubic root of 398800155 is about 736.0688507532.

The spelling of 398800155 in words is "three hundred ninety-eight million, eight hundred thousand, one hundred fifty-five".