25575820 has 24 divisors (see below), whose sum is σ = 56869344. Its totient is φ = 9628416.

The previous prime is 25575817. The next prime is 25575821. The reversal of 25575820 is 2857552.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (25575821) 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, 37272 + ... + 37951.

It is an arithmetic number, because the mean of its divisors is an integer number (2369556).

Almost surely, 2^25575820 is an apocalyptic number.

25575820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25575820 is an abundant number, since it is smaller than the sum of its proper divisors (31293524).

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

25575820 is a wasteful number, since it uses less digits than its factorization.

25575820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75249 (or 75247 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 25575820 is about 5057.2541957074. The cubic root of 25575820 is about 294.6296991177.

The spelling of 25575820 in words is "twenty-five million, five hundred seventy-five thousand, eight hundred twenty".