1231732144 has 40 divisors (see below), whose sum is σ = 2569723920. Its totient is φ = 569806848.

The previous prime is 1231732121. The next prime is 1231732169. The reversal of 1231732144 is 4412371321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22329 + ... + 54424.

It is an arithmetic number, because the mean of its divisors is an integer number (64243098).

Almost surely, 2^1231732144 is an apocalyptic number.

It is an amenable number.

1231732144 is an abundant number, since it is smaller than the sum of its proper divisors (1337991776).

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

1231732144 is a wasteful number, since it uses less digits than its factorization.

1231732144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76837 (or 76831 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 1231732144 is about 35096.0417141307. The cubic root of 1231732144 is about 1071.9439851551.

The spelling of 1231732144 in words is "one billion, two hundred thirty-one million, seven hundred thirty-two thousand, one hundred forty-four".