1139453856 has 216 divisors, whose sum is σ = 3513313440. Its totient is φ = 349620480.

The previous prime is 1139453827. The next prime is 1139453881. The reversal of 1139453856 is 6583549311.

1139453856 is a `hidden beast` number, since 113 + 9 + 453 + 85 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6365575 + ... + 6365753.

It is an arithmetic number, because the mean of its divisors is an integer number (16265340).

Almost surely, 2^1139453856 is an apocalyptic number.

1139453856 is a gapful number since it is divisible by the number (16) 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 1139453856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1756656720).

1139453856 is an abundant number, since it is smaller than the sum of its proper divisors (2373859584).

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

1139453856 is a wasteful number, since it uses less digits than its factorization.

1139453856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 238 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 1139453856 is about 33755.7973687484. The cubic root of 1139453856 is about 1044.4770797039.

The spelling of 1139453856 in words is "one billion, one hundred thirty-nine million, four hundred fifty-three thousand, eight hundred fifty-six".