25812220 has 36 divisors (see below), whose sum is σ = 63057960. Its totient is φ = 8849568.

The previous prime is 25812209. The next prime is 25812277. The reversal of 25812220 is 2221852.

It is a junction number, because it is equal to n+sod(n) for n = 25812191 and 25812200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12190 + ... + 14149.

It is an arithmetic number, because the mean of its divisors is an integer number (1751610).

Almost surely, 2^25812220 is an apocalyptic number.

25812220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25812220 is an abundant number, since it is smaller than the sum of its proper divisors (37245740).

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

25812220 is a wasteful number, since it uses less digits than its factorization.

25812220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26362 (or 26353 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 25812220 is about 5080.5728023521. The cubic root of 25812220 is about 295.5346809921.

The spelling of 25812220 in words is "twenty-five million, eight hundred twelve thousand, two hundred twenty".