1138802556 has 12 divisors (see below), whose sum is σ = 2657205992. Its totient is φ = 379600848.

The previous prime is 1138802531. The next prime is 1138802569. The reversal of 1138802556 is 6552088311.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47450095 + ... + 47450118.

Almost surely, 2^1138802556 is an apocalyptic number.

It is an amenable number.

1138802556 is an abundant number, since it is smaller than the sum of its proper divisors (1518403436).

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

1138802556 is a wasteful number, since it uses less digits than its factorization.

1138802556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94900220 (or 94900218 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 1138802556 is about 33746.1487580435. The cubic root of 1138802556 is about 1044.2780376889.

The spelling of 1138802556 in words is "one billion, one hundred thirty-eight million, eight hundred two thousand, five hundred fifty-six".