1139438055 has 32 divisors (see below), whose sum is σ = 2174137344. Its totient is φ = 498237696.

The previous prime is 1139438029. The next prime is 1139438063. The reversal of 1139438055 is 5508349311.

It is not a de Polignac number, because 1139438055 - 2⁸ = 1139437799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233494 + ... + 238323.

It is an arithmetic number, because the mean of its divisors is an integer number (67941792).

Almost surely, 2^1139438055 is an apocalyptic number.

1139438055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1139438055 is a deficient number, since it is larger than the sum of its proper divisors (1034699289).

1139438055 is a wasteful number, since it uses less digits than its factorization.

1139438055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471855.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 1139438055 is about 33755.5633192515. The cubic root of 1139438055 is about 1044.4722517013.

The spelling of 1139438055 in words is "one billion, one hundred thirty-nine million, four hundred thirty-eight thousand, fifty-five".