25624340 has 48 divisors (see below), whose sum is σ = 62130432. Its totient is φ = 8695296.

The previous prime is 25624337. The next prime is 25624363. The reversal of 25624340 is 4342652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13532 + ... + 15308.

It is an arithmetic number, because the mean of its divisors is an integer number (1294384).

Almost surely, 2^25624340 is an apocalyptic number.

25624340 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 25624340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31065216).

25624340 is an abundant number, since it is smaller than the sum of its proper divisors (36506092).

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

25624340 is a wasteful number, since it uses less digits than its factorization.

25624340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896 (or 1894 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 25624340 is about 5062.0489922560. The cubic root of 25624340 is about 294.8158958527.

Adding to 25624340 its reverse (4342652), we get a palindrome (29966992).

The spelling of 25624340 in words is "twenty-five million, six hundred twenty-four thousand, three hundred forty".