1138132240 has 80 divisors (see below), whose sum is σ = 3033412992. Its totient is φ = 389025792.

The previous prime is 1138132211. The next prime is 1138132277. The reversal of 1138132240 is 422318311.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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, 191392 + ... + 197248.

Almost surely, 2^1138132240 is an apocalyptic number.

1138132240 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 1138132240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1516706496).

1138132240 is an abundant number, since it is smaller than the sum of its proper divisors (1895280752).

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

1138132240 is a wasteful number, since it uses less digits than its factorization.

1138132240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6224 (or 6218 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1138132240 is about 33736.2155553939. The cubic root of 1138132240 is about 1044.0731049839.

The spelling of 1138132240 in words is "one billion, one hundred thirty-eight million, one hundred thirty-two thousand, two hundred forty".