231128870 has 64 divisors (see below), whose sum is σ = 502419456. Its totient is φ = 74874240.

The previous prime is 231128837. The next prime is 231128879. The reversal of 231128870 is 78821132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231128879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92072 + ... + 94548.

It is an arithmetic number, because the mean of its divisors is an integer number (7850304).

Almost surely, 2^231128870 is an apocalyptic number.

231128870 is an abundant number, since it is smaller than the sum of its proper divisors (271290586).

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

231128870 is a wasteful number, since it uses less digits than its factorization.

231128870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 231128870 is about 15202.9230741986. The cubic root of 231128870 is about 613.6933237029.

The spelling of 231128870 in words is "two hundred thirty-one million, one hundred twenty-eight thousand, eight hundred seventy".