25813788 has 144 divisors (see below), whose sum is σ = 82583424. Its totient is φ = 6168960.

The previous prime is 25813771. The next prime is 25813813. The reversal of 25813788 is 88731852.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83931 + ... + 84237.

It is an arithmetic number, because the mean of its divisors is an integer number (573496).

Almost surely, 2^25813788 is an apocalyptic number.

25813788 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 25813788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41291712).

25813788 is an abundant number, since it is smaller than the sum of its proper divisors (56769636).

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

25813788 is a wasteful number, since it uses less digits than its factorization.

25813788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 343 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 25813788 is about 5080.7271133175. The cubic root of 25813788 is about 295.5406650957.

The spelling of 25813788 in words is "twenty-five million, eight hundred thirteen thousand, seven hundred eighty-eight".