25724780 has 12 divisors (see below), whose sum is σ = 54022080. Its totient is φ = 10289904.

The previous prime is 25724773. The next prime is 25724807. The reversal of 25724780 is 8742752.

It is a self number, because there is not a number n which added to its sum of digits gives 25724780.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 643100 + ... + 643139.

It is an arithmetic number, because the mean of its divisors is an integer number (4501840).

Almost surely, 2^25724780 is an apocalyptic number.

25724780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25724780 is an abundant number, since it is smaller than the sum of its proper divisors (28297300).

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

25724780 is a wasteful number, since it uses less digits than its factorization.

25724780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286248 (or 1286246 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 25724780 is about 5071.9601733452. The cubic root of 25724780 is about 295.2005913331.

The spelling of 25724780 in words is "twenty-five million, seven hundred twenty-four thousand, seven hundred eighty".