25716220 has 12 divisors (see below), whose sum is σ = 54004104. Its totient is φ = 10286480.

The previous prime is 25716211. The next prime is 25716227. The reversal of 25716220 is 2261752.

It is a super-2 number, since 2×25716220² = 1322647942176800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25716227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642886 + ... + 642925.

It is an arithmetic number, because the mean of its divisors is an integer number (4500342).

Almost surely, 2^25716220 is an apocalyptic number.

25716220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25716220 is an abundant number, since it is smaller than the sum of its proper divisors (28287884).

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

25716220 is a wasteful number, since it uses less digits than its factorization.

25716220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285820 (or 1285818 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 25716220 is about 5071.1162479281. The cubic root of 25716220 is about 295.1678447311.

Adding to 25716220 its reverse (2261752), we get a palindrome (27977972).

The spelling of 25716220 in words is "twenty-five million, seven hundred sixteen thousand, two hundred twenty".