231675990 has 128 divisors (see below), whose sum is σ = 691310592. Its totient is φ = 48384000.

The previous prime is 231675971. The next prime is 231676031. The reversal of 231675990 is 99576132.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 308115 + ... + 308865.

It is an arithmetic number, because the mean of its divisors is an integer number (5400864).

Almost surely, 2^231675990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231675990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345655296).

231675990 is an abundant number, since it is smaller than the sum of its proper divisors (459634602).

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

231675990 is a wasteful number, since it uses less digits than its factorization.

231675990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 231675990 is about 15220.9063462069. The cubic root of 231675990 is about 614.1771797483.

The spelling of 231675990 in words is "two hundred thirty-one million, six hundred seventy-five thousand, nine hundred ninety".