25231740 has 96 divisors (see below), whose sum is σ = 77474880. Its totient is φ = 6107136.

The previous prime is 25231733. The next prime is 25231747. The reversal of 25231740 is 4713252.

It is an interprime number because it is at equal distance from previous prime (25231733) and next prime (25231747).

It is a self number, because there is not a number n which added to its sum of digits gives 25231740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25231747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29154 + ... + 30006.

It is an arithmetic number, because the mean of its divisors is an integer number (807030).

Almost surely, 2^25231740 is an apocalyptic number.

25231740 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 25231740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38737440).

25231740 is an abundant number, since it is smaller than the sum of its proper divisors (52243140).

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

25231740 is a wasteful number, since it uses less digits than its factorization.

25231740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911 (or 909 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 25231740 is about 5023.1205440443. The cubic root of 25231740 is about 293.3024789631.

Adding to 25231740 its reverse (4713252), we get a palindrome (29944992).

The spelling of 25231740 in words is "twenty-five million, two hundred thirty-one thousand, seven hundred forty".