25400250 has 128 divisors (see below), whose sum is σ = 72783360. Its totient is φ = 6552000.

The previous prime is 25400233. The next prime is 25400251. The reversal of 25400250 is 5200452.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (25400251) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 357715 + ... + 357785.

It is an arithmetic number, because the mean of its divisors is an integer number (568620).

Almost surely, 2^25400250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25400250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36391680).

25400250 is an abundant number, since it is smaller than the sum of its proper divisors (47383110).

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

25400250 is a wasteful number, since it uses less digits than its factorization.

25400250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 25400250 is about 5039.8660696491. The cubic root of 25400250 is about 293.9539703032.

The spelling of 25400250 in words is "twenty-five million, four hundred thousand, two hundred fifty".