25780014 has 72 divisors (see below), whose sum is σ = 62774712. Its totient is φ = 7600320.

The previous prime is 25779997. The next prime is 25780019. The reversal of 25780014 is 41008752.

25780014 = 377² + 378² + ... + 507².

It is a self number, because there is not a number n which added to its sum of digits gives 25780014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25780019) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 196729 + ... + 196859.

It is an arithmetic number, because the mean of its divisors is an integer number (871871).

Almost surely, 2^25780014 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25780014, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31387356).

25780014 is an abundant number, since it is smaller than the sum of its proper divisors (36994698).

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

25780014 is a wasteful number, since it uses less digits than its factorization.

25780014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 25780014 is about 5077.4022885724. The cubic root of 25780014 is about 295.4117166077.

Adding to 25780014 its reverse (41008752), we get a palindrome (66788766).

The spelling of 25780014 in words is "twenty-five million, seven hundred eighty thousand, fourteen".