25421788 has 30 divisors (see below), whose sum is σ = 51919336. Its totient is φ = 10890936.

The previous prime is 25421779. The next prime is 25421797. The reversal of 25421788 is 88712452.

It is an interprime number because it is at equal distance from previous prime (25421779) and next prime (25421797).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8281 + ... + 10927.

Almost surely, 2^25421788 is an apocalyptic number.

25421788 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 25421788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25959668).

25421788 is an abundant number, since it is smaller than the sum of its proper divisors (26497548).

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

25421788 is an equidigital number, since it uses as much as digits as its factorization.

25421788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679 (or 2656 counting only the distinct ones).

The product of its digits is 35840, while the sum is 37.

The square root of 25421788 is about 5042.0023800074. The cubic root of 25421788 is about 294.0370323722.

The spelling of 25421788 in words is "twenty-five million, four hundred twenty-one thousand, seven hundred eighty-eight".