1139987520 has 560 divisors, whose sum is σ = 4756147968. Its totient is φ = 253808640.

The previous prime is 1139987507. The next prime is 1139987531. The reversal of 1139987520 is 257899311.

1139987520 is a `hidden beast` number, since 1 + 1 + 39 + 98 + 7 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (560).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11067789 + ... + 11067891.

Almost surely, 2^1139987520 is an apocalyptic number.

1139987520 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 1139987520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2378073984).

1139987520 is an abundant number, since it is smaller than the sum of its proper divisors (3616160448).

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

1139987520 is a wasteful number, since it uses less digits than its factorization.

1139987520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 1139987520 is about 33763.7012189126. The cubic root of 1139987520 is about 1044.6401147744.

The spelling of 1139987520 in words is "one billion, one hundred thirty-nine million, nine hundred eighty-seven thousand, five hundred twenty".