25859220 has 24 divisors (see below), whose sum is σ = 72405984. Its totient is φ = 6895776.

The previous prime is 25859219. The next prime is 25859221. The reversal of 25859220 is 2295852.

It is an interprime number because it is at equal distance from previous prime (25859219) and next prime (25859221).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25859221) 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, 215434 + ... + 215553.

It is an arithmetic number, because the mean of its divisors is an integer number (3016916).

Almost surely, 2^25859220 is an apocalyptic number.

25859220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25859220 is an abundant number, since it is smaller than the sum of its proper divisors (46546764).

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

25859220 is a wasteful number, since it uses less digits than its factorization.

25859220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430999 (or 430997 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 25859220 is about 5085.1961614081. The cubic root of 25859220 is about 295.7139463161.

The spelling of 25859220 in words is "twenty-five million, eight hundred fifty-nine thousand, two hundred twenty".