1131539738 has 16 divisors (see below), whose sum is σ = 1956951360. Its totient is φ = 480653376.

The previous prime is 1131539723. The next prime is 1131539741. The reversal of 1131539738 is 8379351311.

It is a junction number, because it is equal to n+sod(n) for n = 1131539695 and 1131539704.

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, 356048 + ... + 359211.

It is an arithmetic number, because the mean of its divisors is an integer number (122309460).

Almost surely, 2^1131539738 is an apocalyptic number.

1131539738 is a deficient number, since it is larger than the sum of its proper divisors (825411622).

1131539738 is a wasteful number, since it uses less digits than its factorization.

1131539738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715381.

The product of its digits is 68040, while the sum is 41.

The square root of 1131539738 is about 33638.3670531136. The cubic root of 1131539738 is about 1042.0533084281.

The spelling of 1131539738 in words is "one billion, one hundred thirty-one million, five hundred thirty-nine thousand, seven hundred thirty-eight".