253788765 has 8 divisors (see below), whose sum is σ = 406062048. Its totient is φ = 135354000.

The previous prime is 253788737. The next prime is 253788781. The reversal of 253788765 is 567887352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 253788765 - 2⁷ = 253788637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8459611 + ... + 8459640.

It is an arithmetic number, because the mean of its divisors is an integer number (50757756).

Almost surely, 2^253788765 is an apocalyptic number.

It is an amenable number.

253788765 is a deficient number, since it is larger than the sum of its proper divisors (152273283).

253788765 is a wasteful number, since it uses less digits than its factorization.

253788765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16919259.

The product of its digits is 2822400, while the sum is 51.

The square root of 253788765 is about 15930.7490407702. The cubic root of 253788765 is about 633.1269458317.

It can be divided in two parts, 25378 and 8765, that added together give a palindrome (34143).

The spelling of 253788765 in words is "two hundred fifty-three million, seven hundred eighty-eight thousand, seven hundred sixty-five".