53689788 has 36 divisors (see below), whose sum is σ = 140398440. Its totient is φ = 17279136.

The previous prime is 53689781. The next prime is 53689807. The reversal of 53689788 is 88798635.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53689781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24670 + ... + 26757.

Almost surely, 2^53689788 is an apocalyptic number.

53689788 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

53689788 is an abundant number, since it is smaller than the sum of its proper divisors (86708652).

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

53689788 is a wasteful number, since it uses less digits than its factorization.

53689788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51466 (or 51461 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 53689788 is about 7327.3315743182. The cubic root of 53689788 is about 377.2511419190.

The spelling of 53689788 in words is "fifty-three million, six hundred eighty-nine thousand, seven hundred eighty-eight".