25802780 has 24 divisors (see below), whose sum is σ = 56542752. Its totient is φ = 9872192.

The previous prime is 25802761. The next prime is 25802783. The reversal of 25802780 is 8720852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25802783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27587 + ... + 28506.

It is an arithmetic number, because the mean of its divisors is an integer number (2355948).

Almost surely, 2^25802780 is an apocalyptic number.

25802780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25802780 is an abundant number, since it is smaller than the sum of its proper divisors (30739972).

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

25802780 is a wasteful number, since it uses less digits than its factorization.

25802780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56125 (or 56123 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 25802780 is about 5079.6436882915. The cubic root of 25802780 is about 295.4986491235.

The spelling of 25802780 in words is "twenty-five million, eight hundred two thousand, seven hundred eighty".