25780234 has 4 divisors (see below), whose sum is σ = 38670354. Its totient is φ = 12890116.

The previous prime is 25780229. The next prime is 25780241. The reversal of 25780234 is 43208752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25472209 + 308025 = 5047^2 + 555^2 .

It is a super-3 number, since 3×25780234³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 25780196 and 25780205.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6445057 + ... + 6445060.

Almost surely, 2^25780234 is an apocalyptic number.

25780234 is a deficient number, since it is larger than the sum of its proper divisors (12890120).

25780234 is a wasteful number, since it uses less digits than its factorization.

25780234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12890119.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 25780234 is about 5077.4239531479. The cubic root of 25780234 is about 295.4125569278.

Adding to 25780234 its reverse (43208752), we get a palindrome (68988986).

The spelling of 25780234 in words is "twenty-five million, seven hundred eighty thousand, two hundred thirty-four".