25724226 has 16 divisors (see below), whose sum is σ = 56125728. Its totient is φ = 7795200.

The previous prime is 25724197. The next prime is 25724227. The reversal of 25724226 is 62242752.

It is a junction number, because it is equal to n+sod(n) for n = 25724193 and 25724202.

It is not an unprimeable number, because it can be changed into a prime (25724227) 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, 194815 + ... + 194946.

It is an arithmetic number, because the mean of its divisors is an integer number (3507858).

Almost surely, 2^25724226 is an apocalyptic number.

25724226 is an abundant number, since it is smaller than the sum of its proper divisors (30401502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25724226 is a wasteful number, since it uses less digits than its factorization.

25724226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389777.

The product of its digits is 13440, while the sum is 30.

The square root of 25724226 is about 5071.9055590577. The cubic root of 25724226 is about 295.1984722051.

Adding to 25724226 its reverse (62242752), we get a palindrome (87966978).

The spelling of 25724226 in words is "twenty-five million, seven hundred twenty-four thousand, two hundred twenty-six".