25879780 has 48 divisors (see below), whose sum is σ = 58181760. Its totient is φ = 9635328.

The previous prime is 25879759. The next prime is 25879801. The reversal of 25879780 is 8797852.

It is an interprime number because it is at equal distance from previous prime (25879759) and next prime (25879801).

It is a self number, because there is not a number n which added to its sum of digits gives 25879780.

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, 34651 + ... + 35389.

It is an arithmetic number, because the mean of its divisors is an integer number (1212120).

Almost surely, 2^25879780 is an apocalyptic number.

25879780 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 25879780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29090880).

25879780 is an abundant number, since it is smaller than the sum of its proper divisors (32301980).

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

25879780 is a wasteful number, since it uses less digits than its factorization.

25879780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 25879780 is about 5087.2173140136. The cubic root of 25879780 is about 295.7922970698.

The spelling of 25879780 in words is "twenty-five million, eight hundred seventy-nine thousand, seven hundred eighty".