398811655 has 16 divisors (see below), whose sum is σ = 522547200. Its totient is φ = 289785760.

The previous prime is 398811631. The next prime is 398811659. The reversal of 398811655 is 556118893.

It is not a de Polignac number, because 398811655 - 2⁷ = 398811527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398811659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76626 + ... + 81664.

It is an arithmetic number, because the mean of its divisors is an integer number (32659200).

Almost surely, 2^398811655 is an apocalyptic number.

398811655 is a deficient number, since it is larger than the sum of its proper divisors (123735545).

398811655 is a wasteful number, since it uses less digits than its factorization.

398811655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6494.

The product of its digits is 259200, while the sum is 46.

The square root of 398811655 is about 19970.2692771029. The cubic root of 398811655 is about 736.0759259013.

The spelling of 398811655 in words is "three hundred ninety-eight million, eight hundred eleven thousand, six hundred fifty-five".