1138877556 has 48 divisors (see below), whose sum is σ = 2800042560. Its totient is φ = 359285760.

The previous prime is 1138877533. The next prime is 1138877557. The reversal of 1138877556 is 6557788311.

It is a junction number, because it is equal to n+sod(n) for n = 1138877499 and 1138877508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138877557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313060 + ... + 316676.

It is an arithmetic number, because the mean of its divisors is an integer number (58334220).

Almost surely, 2^1138877556 is an apocalyptic number.

It is an amenable number.

1138877556 is an abundant number, since it is smaller than the sum of its proper divisors (1661165004).

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

1138877556 is a wasteful number, since it uses less digits than its factorization.

1138877556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024 (or 5022 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 51.

The square root of 1138877556 is about 33747.2599776634. The cubic root of 1138877556 is about 1044.3009620999.

The spelling of 1138877556 in words is "one billion, one hundred thirty-eight million, eight hundred seventy-seven thousand, five hundred fifty-six".