25239900 has 216 divisors, whose sum is σ = 90837936. Its totient is φ = 5376000.

The previous prime is 25239881. The next prime is 25239937. The reversal of 25239900 is 993252.

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 nontrivial repunit in base 293.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 249850 + ... + 249950.

It is an arithmetic number, because the mean of its divisors is an integer number (420546).

Almost surely, 2^25239900 is an apocalyptic number.

25239900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25239900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45418968).

25239900 is an abundant number, since it is smaller than the sum of its proper divisors (65598036).

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

25239900 is a wasteful number, since it uses less digits than its factorization.

25239900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 25239900 is about 5023.9327224795. The cubic root of 25239900 is about 293.3340937767.

The spelling of 25239900 in words is "twenty-five million, two hundred thirty-nine thousand, nine hundred".