1139264556 has 24 divisors (see below), whose sum is σ = 2678579904. Its totient is φ = 376855440.

The previous prime is 1139264551. The next prime is 1139264573. The reversal of 1139264556 is 6554629311.

It is not an unprimeable number, because it can be changed into a prime (1139264551) 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, 360790 + ... + 363933.

It is an arithmetic number, because the mean of its divisors is an integer number (111607496).

Almost surely, 2^1139264556 is an apocalyptic number.

It is an amenable number.

1139264556 is an abundant number, since it is smaller than the sum of its proper divisors (1539315348).

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

1139264556 is a wasteful number, since it uses less digits than its factorization.

1139264556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724861 (or 724859 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The square root of 1139264556 is about 33752.9932894847. The cubic root of 1139264556 is about 1044.4192360681.

The spelling of 1139264556 in words is "one billion, one hundred thirty-nine million, two hundred sixty-four thousand, five hundred fifty-six".