1231739960 has 32 divisors (see below), whose sum is σ = 3023362800. Its totient is φ = 447905280.

The previous prime is 1231739921. The next prime is 1231739969. The reversal of 1231739960 is 699371321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231739969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1399265 + ... + 1400144.

Almost surely, 2^1231739960 is an apocalyptic number.

1231739960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231739960 is an abundant number, since it is smaller than the sum of its proper divisors (1791622840).

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

1231739960 is a wasteful number, since it uses less digits than its factorization.

1231739960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2799431 (or 2799427 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 1231739960 is about 35096.1530655427. The cubic root of 1231739960 is about 1071.9462525032.

The spelling of 1231739960 in words is "one billion, two hundred thirty-one million, seven hundred thirty-nine thousand, nine hundred sixty".