1138877500 has 90 divisors (see below), whose sum is σ = 2562142352. Its totient is φ = 442800000.

The previous prime is 1138877483. The next prime is 1138877507. The reversal of 1138877500 is 57788311.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138877507) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 4202365 + ... + 4202635.

Almost surely, 2^1138877500 is an apocalyptic number.

1138877500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1138877500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1281071176).

1138877500 is an abundant number, since it is smaller than the sum of its proper divisors (1423264852).

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

1138877500 is an equidigital number, since it uses as much as digits as its factorization.

1138877500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 40.

The square root of 1138877500 is about 33747.2591479664. The cubic root of 1138877500 is about 1044.3009449834.

It can be divided in two parts, 11388 and 77500, that added together give a palindrome (88888).

The spelling of 1138877500 in words is "one billion, one hundred thirty-eight million, eight hundred seventy-seven thousand, five hundred".