1138412550 has 96 divisors (see below), whose sum is σ = 3242113920. Its totient is φ = 261446400.

The previous prime is 1138412549. The next prime is 1138412551. The reversal of 1138412550 is 552148311.

It is an interprime number because it is at equal distance from previous prime (1138412549) and next prime (1138412551).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138412551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13194 + ... + 49506.

It is an arithmetic number, because the mean of its divisors is an integer number (33772020).

Almost surely, 2^1138412550 is an apocalyptic number.

1138412550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1138412550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1621056960).

1138412550 is an abundant number, since it is smaller than the sum of its proper divisors (2103701370).

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

1138412550 is a wasteful number, since it uses less digits than its factorization.

1138412550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36358 (or 36353 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 1138412550 is about 33740.3697371561. The cubic root of 1138412550 is about 1044.1588126894.

The spelling of 1138412550 in words is "one billion, one hundred thirty-eight million, four hundred twelve thousand, five hundred fifty".