25724422 has 4 divisors (see below), whose sum is σ = 38586636. Its totient is φ = 12862210.

The previous prime is 25724411. The next prime is 25724429. The reversal of 25724422 is 22442752.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25724429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6431104 + ... + 6431107.

It is an arithmetic number, because the mean of its divisors is an integer number (9646659).

Almost surely, 2^25724422 is an apocalyptic number.

25724422 is a deficient number, since it is larger than the sum of its proper divisors (12862214).

25724422 is a wasteful number, since it uses less digits than its factorization.

25724422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12862213.

The product of its digits is 8960, while the sum is 28.

The square root of 25724422 is about 5071.9248811472. The cubic root of 25724422 is about 295.1992219362.

The spelling of 25724422 in words is "twenty-five million, seven hundred twenty-four thousand, four hundred twenty-two".