25782730 has 8 divisors (see below), whose sum is σ = 46408932. Its totient is φ = 10313088.

The previous prime is 25782721. The next prime is 25782733. The reversal of 25782730 is 3728752.

It can be written as a sum of positive squares in 2 ways, for example, as 25674489 + 108241 = 5067^2 + 329^2 .

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

It is not an unprimeable number, because it can be changed into a prime (25782733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1289127 + ... + 1289146.

Almost surely, 2^25782730 is an apocalyptic number.

25782730 is a deficient number, since it is larger than the sum of its proper divisors (20626202).

25782730 is a wasteful number, since it uses less digits than its factorization.

25782730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578280.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 25782730 is about 5077.6697411313. The cubic root of 25782730 is about 295.4220904067.

The spelling of 25782730 in words is "twenty-five million, seven hundred eighty-two thousand, seven hundred thirty".