25837890 has 64 divisors (see below), whose sum is σ = 67568256. Its totient is φ = 6285312.

The previous prime is 25837879. The next prime is 25837897. The reversal of 25837890 is 9873852.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25837897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37489 + ... + 38171.

It is an arithmetic number, because the mean of its divisors is an integer number (1055754).

Almost surely, 2^25837890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25837890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33784128).

25837890 is an abundant number, since it is smaller than the sum of its proper divisors (41730366).

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

25837890 is a wasteful number, since it uses less digits than its factorization.

25837890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 25837890 is about 5083.0984645195. The cubic root of 25837890 is about 295.6326173157.

The spelling of 25837890 in words is "twenty-five million, eight hundred thirty-seven thousand, eight hundred ninety".