25700280 has 64 divisors (see below), whose sum is σ = 78105600. Its totient is φ = 6764160.

The previous prime is 25700273. The next prime is 25700281. The reversal of 25700280 is 8200752.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 25700280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25700281) 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 15 ways as a sum of consecutive naturals, for example, 8125 + ... + 10835.

It is an arithmetic number, because the mean of its divisors is an integer number (1220400).

Almost surely, 2^25700280 is an apocalyptic number.

25700280 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 25700280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39052800).

25700280 is an abundant number, since it is smaller than the sum of its proper divisors (52405320).

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

25700280 is a wasteful number, since it uses less digits than its factorization.

25700280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804 (or 2800 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 25700280 is about 5069.5443582239. The cubic root of 25700280 is about 295.1068462913.

The spelling of 25700280 in words is "twenty-five million, seven hundred thousand, two hundred eighty".