25724232 has 24 divisors (see below), whose sum is σ = 69669990. Its totient is φ = 8574720.

The previous prime is 25724227. The next prime is 25724267. The reversal of 25724232 is 23242752.

It can be written as a sum of positive squares in only one way, i.e., 21288996 + 4435236 = 4614^2 + 2106^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×25724232² = 1323472223979648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25724196 and 25724205.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 178569 + ... + 178712.

Almost surely, 2^25724232 is an apocalyptic number.

It is an amenable number.

25724232 is an abundant number, since it is smaller than the sum of its proper divisors (43945758).

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

25724232 is a wasteful number, since it uses less digits than its factorization.

25724232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357293 (or 357286 counting only the distinct ones).

The product of its digits is 6720, while the sum is 27.

The square root of 25724232 is about 5071.9061505513. The cubic root of 25724232 is about 295.1984951561.

Adding to 25724232 its reverse (23242752), we get a palindrome (48966984).

The spelling of 25724232 in words is "twenty-five million, seven hundred twenty-four thousand, two hundred thirty-two".