25390890 has 96 divisors (see below), whose sum is σ = 77366016. Its totient is φ = 5656320.

The previous prime is 25390853. The next prime is 25390901. The reversal of 25390890 is 9809352.

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 47 ways as a sum of consecutive naturals, for example, 25339 + ... + 26321.

It is an arithmetic number, because the mean of its divisors is an integer number (805896).

Almost surely, 2^25390890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25390890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38683008).

25390890 is an abundant number, since it is smaller than the sum of its proper divisors (51975126).

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

25390890 is a wasteful number, since it uses less digits than its factorization.

25390890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044 (or 1041 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 25390890 is about 5038.9373879817. The cubic root of 25390890 is about 293.9178584907.

The spelling of 25390890 in words is "twenty-five million, three hundred ninety thousand, eight hundred ninety".