53388765 has 48 divisors (see below), whose sum is σ = 99852480. Its totient is φ = 26300160.

The previous prime is 53388761. The next prime is 53388787. The reversal of 53388765 is 56788335.

It is not a de Polignac number, because 53388765 - 2² = 53388761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 53388765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53388761) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34294 + ... + 35816.

It is an arithmetic number, because the mean of its divisors is an integer number (2080260).

Almost surely, 2^53388765 is an apocalyptic number.

It is an amenable number.

53388765 is a deficient number, since it is larger than the sum of its proper divisors (46463715).

53388765 is a wasteful number, since it uses less digits than its factorization.

53388765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594 (or 1591 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 53388765 is about 7306.7615945780. The cubic root of 53388765 is about 376.5447743876.

It can be divided in two parts, 533 and 88765, that added together give a palindrome (89298).

The spelling of 53388765 in words is "fifty-three million, three hundred eighty-eight thousand, seven hundred sixty-five".