1138739456 has 36 divisors (see below), whose sum is σ = 2275382844. Its totient is φ = 568780800.

The previous prime is 1138739449. The next prime is 1138739473. The reversal of 1138739456 is 6549378311.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 705433600 + 433305856 = 26560^2 + 20816^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1138739456.

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, 351926 + ... + 355146.

It is an arithmetic number, because the mean of its divisors is an integer number (63205079).

Almost surely, 2^1138739456 is an apocalyptic number.

1138739456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1138739456 is a deficient number, since it is larger than the sum of its proper divisors (1136643388).

1138739456 is an equidigital number, since it uses as much as digits as its factorization.

1138739456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4618 (or 4604 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The square root of 1138739456 is about 33745.2138235928. The cubic root of 1138739456 is about 1044.2587498381.

The spelling of 1138739456 in words is "one billion, one hundred thirty-eight million, seven hundred thirty-nine thousand, four hundred fifty-six".