25780369 has 8 divisors (see below), whose sum is σ = 26479208. Its totient is φ = 25090560.

The previous prime is 25780367. The next prime is 25780409. The reversal of 25780369 is 96308752.

It can be written as a sum of positive squares in 4 ways, for example, as 4730625 + 21049744 = 2175^2 + 4588^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25780369 - 2¹ = 25780367 is a prime.

It is a super-2 number, since 2×25780369² = 1329254851552322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25780367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3739 + ... + 8095.

It is an arithmetic number, because the mean of its divisors is an integer number (3309901).

Almost surely, 2^25780369 is an apocalyptic number.

It is an amenable number.

25780369 is a deficient number, since it is larger than the sum of its proper divisors (698839).

25780369 is an equidigital number, since it uses as much as digits as its factorization.

25780369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4515.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 25780369 is about 5077.4372472735. The cubic root of 25780369 is about 295.4130725764.

The spelling of 25780369 in words is "twenty-five million, seven hundred eighty thousand, three hundred sixty-nine".