1139473440 has 384 divisors, whose sum is σ = 4656960000. Its totient is φ = 260112384.

The previous prime is 1139473421. The next prime is 1139473451. The reversal of 1139473440 is 443749311.

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

It is a junction number, because it is equal to n+sod(n) for n = 1139473395 and 1139473404.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1481376 + ... + 1482144.

It is an arithmetic number, because the mean of its divisors is an integer number (12127500).

Almost surely, 2^1139473440 is an apocalyptic number.

1139473440 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 1139473440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2328480000).

1139473440 is an abundant number, since it is smaller than the sum of its proper divisors (3517486560).

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

1139473440 is an equidigital number, since it uses as much as digits as its factorization.

1139473440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 786 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 1139473440 is about 33756.0874510065. The cubic root of 1139473440 is about 1044.4830635419.

The spelling of 1139473440 in words is "one billion, one hundred thirty-nine million, four hundred seventy-three thousand, four hundred forty".