53139834 has 64 divisors (see below), whose sum is σ = 129962880. Its totient is φ = 15960960.

The previous prime is 53139833. The next prime is 53139851. The reversal of 53139834 is 43893135.

53139834 is a `hidden beast` number, since 531 + 3 + 98 + 34 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53139833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81052 + ... + 81704.

It is an arithmetic number, because the mean of its divisors is an integer number (2030670).

Almost surely, 2^53139834 is an apocalyptic number.

53139834 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 53139834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64981440).

53139834 is an abundant number, since it is smaller than the sum of its proper divisors (76823046).

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

53139834 is a wasteful number, since it uses less digits than its factorization.

53139834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 806 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 53139834 is about 7289.7074015354. The cubic root of 53139834 is about 375.9586352941.

The spelling of 53139834 in words is "fifty-three million, one hundred thirty-nine thousand, eight hundred thirty-four".