1131439960 has 64 divisors (see below), whose sum is σ = 2913019200. Its totient is φ = 387442176.

The previous prime is 1131439957. The next prime is 1131439963. The reversal of 1131439960 is 699341311.

It is an interprime number because it is at equal distance from previous prime (1131439957) and next prime (1131439963).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131439963) 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, 281646 + ... + 285634.

It is an arithmetic number, because the mean of its divisors is an integer number (45515925).

Almost surely, 2^1131439960 is an apocalyptic number.

1131439960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131439960 is an abundant number, since it is smaller than the sum of its proper divisors (1781579240).

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

1131439960 is a wasteful number, since it uses less digits than its factorization.

1131439960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5020 (or 5016 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 1131439960 is about 33636.8839222660. The cubic root of 1131439960 is about 1042.0226784680.

The spelling of 1131439960 in words is "one billion, one hundred thirty-one million, four hundred thirty-nine thousand, nine hundred sixty".