25351890 has 64 divisors (see below), whose sum is σ = 64972800. Its totient is φ = 6312384.

The previous prime is 25351877. The next prime is 25351891. The reversal of 25351890 is 9815352.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25351891) 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, 44749 + ... + 45311.

It is an arithmetic number, because the mean of its divisors is an integer number (1015200).

Almost surely, 2^25351890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25351890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32486400).

25351890 is an abundant number, since it is smaller than the sum of its proper divisors (39620910).

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

25351890 is a wasteful number, since it uses less digits than its factorization.

25351890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 25351890 is about 5035.0660373028. The cubic root of 25351890 is about 293.7672970047.

The spelling of 25351890 in words is "twenty-five million, three hundred fifty-one thousand, eight hundred ninety".