1139959728 has 60 divisors (see below), whose sum is σ = 3192572448. Its totient is φ = 379716480.

The previous prime is 1139959687. The next prime is 1139959729. The reversal of 1139959728 is 8279599311.

1139959728 is a `hidden beast` number, since 11 + 39 + 9 + 597 + 2 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (1139959729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 397018 + ... + 399878.

Almost surely, 2^1139959728 is an apocalyptic number.

1139959728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1139959728 is an abundant number, since it is smaller than the sum of its proper divisors (2052612720).

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

1139959728 is a wasteful number, since it uses less digits than its factorization.

1139959728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5642 (or 5633 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 1139959728 is about 33763.2896501511. The cubic root of 1139959728 is about 1044.6316255370.

The spelling of 1139959728 in words is "one billion, one hundred thirty-nine million, nine hundred fifty-nine thousand, seven hundred twenty-eight".