53139680 has 96 divisors (see below), whose sum is σ = 138710880. Its totient is φ = 19077120.

The previous prime is 53139631. The next prime is 53139689. The reversal of 53139680 is 8693135.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 53139680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53139689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191702 + ... + 191978.

It is an arithmetic number, because the mean of its divisors is an integer number (1444905).

Almost surely, 2^53139680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53139680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69355440).

53139680 is an abundant number, since it is smaller than the sum of its proper divisors (85571200).

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

53139680 is a wasteful number, since it uses less digits than its factorization.

53139680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 53139680 is about 7289.6968386895. The cubic root of 53139680 is about 375.9582721159.

The spelling of 53139680 in words is "fifty-three million, one hundred thirty-nine thousand, six hundred eighty".