1139742864 has 120 divisors (see below), whose sum is σ = 3515191680. Its totient is φ = 342510336.

The previous prime is 1139742859. The next prime is 1139742979. The reversal of 1139742864 is 4682479311.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73417 + ... + 87575.

It is an arithmetic number, because the mean of its divisors is an integer number (29293264).

Almost surely, 2^1139742864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1139742864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1757595840).

1139742864 is an abundant number, since it is smaller than the sum of its proper divisors (2375448816).

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

1139742864 is a wasteful number, since it uses less digits than its factorization.

1139742864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14229 (or 14220 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 1139742864 is about 33760.0779619953. The cubic root of 1139742864 is about 1044.5653783547.

The spelling of 1139742864 in words is "one billion, one hundred thirty-nine million, seven hundred forty-two thousand, eight hundred sixty-four".