25308220 has 24 divisors (see below), whose sum is σ = 60740064. Its totient is φ = 8677056.

The previous prime is 25308197. The next prime is 25308221. The reversal of 25308220 is 2280352.

It is a junction number, because it is equal to n+sod(n) for n = 25308191 and 25308200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25308221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90247 + ... + 90526.

It is an arithmetic number, because the mean of its divisors is an integer number (2530836).

Almost surely, 2^25308220 is an apocalyptic number.

25308220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25308220 is an abundant number, since it is smaller than the sum of its proper divisors (35431844).

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

25308220 is a wasteful number, since it uses less digits than its factorization.

25308220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180789 (or 180787 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 25308220 is about 5030.7275815731. The cubic root of 25308220 is about 293.5985233810.

Adding to 25308220 its reverse (2280352), we get a palindrome (27588572).

The spelling of 25308220 in words is "twenty-five million, three hundred eight thousand, two hundred twenty".