25773220 has 48 divisors (see below), whose sum is σ = 59447808. Its totient is φ = 9308160.

The previous prime is 25773193. The next prime is 25773221. The reversal of 25773220 is 2237752.

It is not an unprimeable number, because it can be changed into a prime (25773221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42157 + ... + 42763.

It is an arithmetic number, because the mean of its divisors is an integer number (1238496).

Almost surely, 2^25773220 is an apocalyptic number.

25773220 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 25773220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29723904).

25773220 is an abundant number, since it is smaller than the sum of its proper divisors (33674588).

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

25773220 is a wasteful number, since it uses less digits than its factorization.

25773220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820 (or 818 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 25773220 is about 5076.7332015776. The cubic root of 25773220 is about 295.3857636410.

It can be divided in two parts, 257732 and 20, that added together give a palindrome (257752).

The spelling of 25773220 in words is "twenty-five million, seven hundred seventy-three thousand, two hundred twenty".