1139536782 has 48 divisors (see below), whose sum is σ = 2584178640. Its totient is φ = 372088080.

The previous prime is 1139536777. The next prime is 1139536787. The reversal of 1139536782 is 2876359311.

1139536782 is a `hidden beast` number, since 1 + 1 + 39 + 536 + 7 + 82 = 666.

It is an interprime number because it is at equal distance from previous prime (1139536777) and next prime (1139536787).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139536787) by changing a digit.

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, 1805607 + ... + 1806237.

It is an arithmetic number, because the mean of its divisors is an integer number (53837055).

Almost surely, 2^1139536782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1139536782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1292089320).

1139536782 is an abundant number, since it is smaller than the sum of its proper divisors (1444641858).

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

1139536782 is an frugal number, since it uses more digits than its factorization.

1139536782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326 (or 689 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 1139536782 is about 33757.0256687404. The cubic root of 1139536782 is about 1044.5024170485.

The spelling of 1139536782 in words is "one billion, one hundred thirty-nine million, five hundred thirty-six thousand, seven hundred eighty-two".