53139378 has 16 divisors (see below), whose sum is σ = 106737696. Its totient is φ = 17636640.

The previous prime is 53139367. The next prime is 53139379. The reversal of 53139378 is 87393135.

It is not an unprimeable number, because it can be changed into a prime (53139379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17608 + ... + 20403.

It is an arithmetic number, because the mean of its divisors is an integer number (6671106).

Almost surely, 2^53139378 is an apocalyptic number.

53139378 is an abundant number, since it is smaller than the sum of its proper divisors (53598318).

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

53139378 is a wasteful number, since it uses less digits than its factorization.

53139378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38249.

The product of its digits is 68040, while the sum is 39.

The square root of 53139378 is about 7289.6761244928. The cubic root of 53139378 is about 375.9575599073.

The spelling of 53139378 in words is "fifty-three million, one hundred thirty-nine thousand, three hundred seventy-eight".