1138752720 has 120 divisors (see below), whose sum is σ = 4370660736. Its totient is φ = 260285184.

The previous prime is 1138752691. The next prime is 1138752731. The reversal of 1138752720 is 272578311.

1138752720 is a `hidden beast` number, since 1 + 1 + 387 + 5 + 272 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107932 + ... + 118011.

Almost surely, 2^1138752720 is an apocalyptic number.

1138752720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1138752720 is an abundant number, since it is smaller than the sum of its proper divisors (3231908016).

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

1138752720 is a wasteful number, since it uses less digits than its factorization.

1138752720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225969 (or 225960 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 1138752720 is about 33745.4103545949. The cubic root of 1138752720 is about 1044.2628043196.

The spelling of 1138752720 in words is "one billion, one hundred thirty-eight million, seven hundred fifty-two thousand, seven hundred twenty".