1138403544 has 64 divisors (see below), whose sum is σ = 3059596800. Its totient is φ = 351840384.

The previous prime is 1138403507. The next prime is 1138403551. The reversal of 1138403544 is 4453048311.

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, 5127 + ... + 47990.

It is an arithmetic number, because the mean of its divisors is an integer number (47806200).

Almost surely, 2^1138403544 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 1138403544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1529798400).

1138403544 is an abundant number, since it is smaller than the sum of its proper divisors (1921193256).

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

1138403544 is a wasteful number, since it uses less digits than its factorization.

1138403544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53192 (or 53188 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 1138403544 is about 33740.2362765882. The cubic root of 1138403544 is about 1044.1560592298.

The spelling of 1138403544 in words is "one billion, one hundred thirty-eight million, four hundred three thousand, five hundred forty-four".