25525830 has 32 divisors (see below), whose sum is σ = 66832128. Its totient is φ = 6188000.

The previous prime is 25525817. The next prime is 25525847. The reversal of 25525830 is 3852552.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38346 + ... + 39005.

It is an arithmetic number, because the mean of its divisors is an integer number (2088504).

Almost surely, 2^25525830 is an apocalyptic number.

25525830 is an abundant number, since it is smaller than the sum of its proper divisors (41306298).

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

25525830 is a wasteful number, since it uses less digits than its factorization.

25525830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77372.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 25525830 is about 5052.3093729502. The cubic root of 25525830 is about 294.4376147566.

The spelling of 25525830 in words is "twenty-five million, five hundred twenty-five thousand, eight hundred thirty".