1139402880 has 576 divisors, whose sum is σ = 5006551680. Its totient is φ = 236113920.

The previous prime is 1139402879. The next prime is 1139402897. The reversal of 1139402880 is 882049311.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 71 ways as a sum of consecutive naturals, for example, 3104457 + ... + 3104823.

It is an arithmetic number, because the mean of its divisors is an integer number (8691930).

Almost surely, 2^1139402880 is an apocalyptic number.

1139402880 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 1139402880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2503275840).

1139402880 is an abundant number, since it is smaller than the sum of its proper divisors (3867148800).

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

1139402880 is a wasteful number, since it uses less digits than its factorization.

1139402880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1139402880 is about 33755.0422900046. The cubic root of 1139402880 is about 1044.4615038040.

The spelling of 1139402880 in words is "one billion, one hundred thirty-nine million, four hundred two thousand, eight hundred eighty".