1139865064 has 64 divisors (see below), whose sum is σ = 2357994240. Its totient is φ = 513327360.

The previous prime is 1139865029. The next prime is 1139865091. The reversal of 1139865064 is 4605689311.

It is a self number, because there is not a number n which added to its sum of digits gives 1139865064.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1250769 + ... + 1251679.

It is an arithmetic number, because the mean of its divisors is an integer number (36843660).

Almost surely, 2^1139865064 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 1139865064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1178997120).

1139865064 is an abundant number, since it is smaller than the sum of its proper divisors (1218129176).

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

1139865064 is a wasteful number, since it uses less digits than its factorization.

1139865064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210 (or 1206 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 1139865064 is about 33761.8877434305. The cubic root of 1139865064 is about 1044.6027088004.

The spelling of 1139865064 in words is "one billion, one hundred thirty-nine million, eight hundred sixty-five thousand, sixty-four".