53699688 has 144 divisors (see below), whose sum is σ = 174994560. Its totient is φ = 14817600.

The previous prime is 53699671. The next prime is 53699699. The reversal of 53699688 is 88699635.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 109123 + ... + 109613.

It is an arithmetic number, because the mean of its divisors is an integer number (1215240).

Almost surely, 2^53699688 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 53699688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87497280).

53699688 is an abundant number, since it is smaller than the sum of its proper divisors (121294872).

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

53699688 is a wasteful number, since it uses less digits than its factorization.

53699688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 534 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 53699688 is about 7328.0070960664. The cubic root of 53699688 is about 377.2743279345.

The spelling of 53699688 in words is "fifty-three million, six hundred ninety-nine thousand, six hundred eighty-eight".