1139155500 has 384 divisors, whose sum is σ = 4075868160. Its totient is φ = 241612800.

The previous prime is 1139155429. The next prime is 1139155517. The reversal of 1139155500 is 55519311.

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

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 127 ways as a sum of consecutive naturals, for example, 12799456 + ... + 12799544.

It is an arithmetic number, because the mean of its divisors is an integer number (10614240).

Almost surely, 2^1139155500 is an apocalyptic number.

1139155500 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 1139155500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2037934080).

1139155500 is an abundant number, since it is smaller than the sum of its proper divisors (2936712660).

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

1139155500 is a wasteful number, since it uses less digits than its factorization.

1139155500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 3375, while the sum is 30.

The square root of 1139155500 is about 33751.3777496564. The cubic root of 1139155500 is about 1044.3859093580.

The spelling of 1139155500 in words is "one billion, one hundred thirty-nine million, one hundred fifty-five thousand, five hundred".