25234440 has 128 divisors (see below), whose sum is σ = 94417920. Its totient is φ = 5241600.

The previous prime is 25234439. The next prime is 25234459. The reversal of 25234440 is 4443252.

It is a super-2 number, since 2×25234440² = 1273553924227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 25234440.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7875 + ... + 10605.

It is an arithmetic number, because the mean of its divisors is an integer number (737640).

Almost surely, 2^25234440 is an apocalyptic number.

25234440 is a gapful number since it is divisible by the number (20) 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 25234440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47208960).

25234440 is an abundant number, since it is smaller than the sum of its proper divisors (69183480).

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

25234440 is a wasteful number, since it uses less digits than its factorization.

25234440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2763 (or 2759 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 25234440 is about 5023.3892940922. The cubic root of 25234440 is about 293.3129405015.

Adding to 25234440 its reverse (4443252), we get a palindrome (29677692).

The spelling of 25234440 in words is "twenty-five million, two hundred thirty-four thousand, four hundred forty".