398232660 has 48 divisors (see below), whose sum is σ = 1274345856. Its totient is φ = 91024512.

The previous prime is 398232643. The next prime is 398232661. The reversal of 398232660 is 66232893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398232661) 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, 473667 + ... + 474506.

It is an arithmetic number, because the mean of its divisors is an integer number (26548872).

Almost surely, 2^398232660 is an apocalyptic number.

398232660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

398232660 is an abundant number, since it is smaller than the sum of its proper divisors (876113196).

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

398232660 is a wasteful number, since it uses less digits than its factorization.

398232660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948192 (or 948190 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 398232660 is about 19955.7675873418. The cubic root of 398232660 is about 735.7195415556.

The spelling of 398232660 in words is "three hundred ninety-eight million, two hundred thirty-two thousand, six hundred sixty".