1139858660 has 24 divisors (see below), whose sum is σ = 2394752640. Its totient is φ = 455743584.

The previous prime is 1139858647. The next prime is 1139858669. The reversal of 1139858660 is 668589311.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1139858669) 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, 39557 + ... + 62003.

It is an arithmetic number, because the mean of its divisors is an integer number (99781360).

Almost surely, 2^1139858660 is an apocalyptic number.

1139858660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1139858660 is an abundant number, since it is smaller than the sum of its proper divisors (1254893980).

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

1139858660 is a wasteful number, since it uses less digits than its factorization.

1139858660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24995 (or 24993 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 1139858660 is about 33761.7929026289. The cubic root of 1139858660 is about 1044.6007525314.

The spelling of 1139858660 in words is "one billion, one hundred thirty-nine million, eight hundred fifty-eight thousand, six hundred sixty".