1138488750 has 320 divisors, whose sum is σ = 3718809600. Its totient is φ = 252720000.

The previous prime is 1138488731. The next prime is 1138488781. The reversal of 1138488750 is 578848311.

It is a happy number.

1138488750 is a `hidden beast` number, since 113 + 8 + 488 + 7 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1138488696 and 1138488705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 14411211 + ... + 14411289.

It is an arithmetic number, because the mean of its divisors is an integer number (11621280).

Almost surely, 2^1138488750 is an apocalyptic number.

1138488750 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 1138488750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1859404800).

1138488750 is an abundant number, since it is smaller than the sum of its proper divisors (2580320850).

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

1138488750 is an equidigital number, since it uses as much as digits as its factorization.

1138488750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The square root of 1138488750 is about 33741.4989293600. The cubic root of 1138488750 is about 1044.1821092018.

The spelling of 1138488750 in words is "one billion, one hundred thirty-eight million, four hundred eighty-eight thousand, seven hundred fifty".