7438955139 has 48 divisors (see below), whose sum is σ = 13985447040. Its totient is φ = 3864384720.

The previous prime is 7438955129. The next prime is 7438955141. The reversal of 7438955139 is 9315598347.

7438955139 is a `hidden beast` number, since 7 + 4 + 3 + 89 + 551 + 3 + 9 = 666.

It is not a de Polignac number, because 7438955139 - 2¹² = 7438951043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7438955129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 241029 + ... + 270134.

It is an arithmetic number, because the mean of its divisors is an integer number (291363480).

Almost surely, 2^7438955139 is an apocalyptic number.

7438955139 is a deficient number, since it is larger than the sum of its proper divisors (6546491901).

7438955139 is a wasteful number, since it uses less digits than its factorization.

7438955139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511197 (or 511184 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The square root of 7438955139 is about 86249.3776151457. The cubic root of 7438955139 is about 1952.1086231706.

The spelling of 7438955139 in words is "seven billion, four hundred thirty-eight million, nine hundred fifty-five thousand, one hundred thirty-nine".