25229568 has 216 divisors, whose sum is σ = 87221568. Its totient is φ = 6303744.

The previous prime is 25229563. The next prime is 25229573. The reversal of 25229568 is 86592252.

It is an interprime number because it is at equal distance from previous prime (25229563) and next prime (25229573).

It is a super-2 number, since 2×25229568² = 1273062202933248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (25229563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1327863 + ... + 1327881.

Almost surely, 2^25229568 is an apocalyptic number.

25229568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25229568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43610784).

25229568 is an abundant number, since it is smaller than the sum of its proper divisors (61992000).

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

25229568 is a wasteful number, since it uses less digits than its factorization.

25229568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 44 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 25229568 is about 5022.9043391249. The cubic root of 25229568 is about 293.2940626950.

It can be divided in two parts, 2522 and 9568, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 25229568 in words is "twenty-five million, two hundred twenty-nine thousand, five hundred sixty-eight".