25898220 has 36 divisors (see below), whose sum is σ = 78558480. Its totient is φ = 6906144.

The previous prime is 25898219. The next prime is 25898231. The reversal of 25898220 is 2289852.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 71760 + ... + 72119.

It is an arithmetic number, because the mean of its divisors is an integer number (2182180).

Almost surely, 2^25898220 is an apocalyptic number.

25898220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25898220 is an abundant number, since it is smaller than the sum of its proper divisors (52660260).

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

25898220 is a wasteful number, since it uses less digits than its factorization.

25898220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143894 (or 143889 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 25898220 is about 5089.0293770030. The cubic root of 25898220 is about 295.8625335633.

The spelling of 25898220 in words is "twenty-five million, eight hundred ninety-eight thousand, two hundred twenty".