1138758456 has 64 divisors (see below), whose sum is σ = 3145075200. Its totient is φ = 340704000.

The previous prime is 1138758449. The next prime is 1138758493. The reversal of 1138758456 is 6548578311.

It is a super-2 number, since 2×1138758456² = 2593541642223007872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6445 + ... + 48156.

It is an arithmetic number, because the mean of its divisors is an integer number (49141800).

Almost surely, 2^1138758456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1138758456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1572537600).

1138758456 is an abundant number, since it is smaller than the sum of its proper divisors (2006316744).

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

1138758456 is a wasteful number, since it uses less digits than its factorization.

1138758456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54700 (or 54696 counting only the distinct ones).

The product of its digits is 806400, while the sum is 48.

The square root of 1138758456 is about 33745.4953438233. The cubic root of 1138758456 is about 1044.2645576653.

The spelling of 1138758456 in words is "one billion, one hundred thirty-eight million, seven hundred fifty-eight thousand, four hundred fifty-six".