1139040028 has 12 divisors (see below), whose sum is σ = 2278080112. Its totient is φ = 488160000.

The previous prime is 1139040011. The next prime is 1139040031. The reversal of 1139040028 is 8200409311.

It is a happy number.

1139040028 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 40680001 = 1139040028 / (1 + 1 + 3 + 9 + 0 + 4 + 0 + 0 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 1139039978 and 1139040005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20339973 + ... + 20340028.

Almost surely, 2^1139040028 is an apocalyptic number.

It is an amenable number.

1139040028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1139040028 is a wasteful number, since it uses less digits than its factorization.

1139040028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40680012 (or 40680010 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1139040028 is about 33749.6670798395. The cubic root of 1139040028 is about 1044.3506196471.

Adding to 1139040028 its reverse (8200409311), we get a palindrome (9339449339).

The spelling of 1139040028 in words is "one billion, one hundred thirty-nine million, forty thousand, twenty-eight".