25387776 has 72 divisors (see below), whose sum is σ = 75096560. Its totient is φ = 8460288.

The previous prime is 25387771. The next prime is 25387787. The reversal of 25387776 is 67778352.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (25387771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5076 + ... + 8748.

Almost surely, 2^25387776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25387776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37548280).

25387776 is an abundant number, since it is smaller than the sum of its proper divisors (49708784).

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

25387776 is an equidigital number, since it uses as much as digits as its factorization.

25387776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3698 (or 3678 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 25387776 is about 5038.6283847889. The cubic root of 25387776 is about 293.9058424010.

The spelling of 25387776 in words is "twenty-five million, three hundred eighty-seven thousand, seven hundred seventy-six".