398611560 has 32 divisors (see below), whose sum is σ = 1195835040. Its totient is φ = 106296384.

The previous prime is 398611541. The next prime is 398611571. The reversal of 398611560 is 65116893.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1660762 + ... + 1661001.

It is an arithmetic number, because the mean of its divisors is an integer number (37369845).

Almost surely, 2^398611560 is an apocalyptic number.

398611560 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

398611560 is an abundant number, since it is smaller than the sum of its proper divisors (797223480).

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

398611560 is a wasteful number, since it uses less digits than its factorization.

398611560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3321777 (or 3321773 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 398611560 is about 19965.2588262712. The cubic root of 398611560 is about 735.9528019907.

It can be divided in two parts, 398611 and 560, that added together give a triangular number (399171 = T₈₉₃).

The spelling of 398611560 in words is "three hundred ninety-eight million, six hundred eleven thousand, five hundred sixty".