25465890 has 64 divisors (see below), whose sum is σ = 65894400. Its totient is φ = 6277824.

The previous prime is 25465889. The next prime is 25465897. The reversal of 25465890 is 9856452.

It is not an unprimeable number, because it can be changed into a prime (25465897) 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, 23991 + ... + 25029.

It is an arithmetic number, because the mean of its divisors is an integer number (1029600).

Almost surely, 2^25465890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25465890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32947200).

25465890 is an abundant number, since it is smaller than the sum of its proper divisors (40428510).

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

25465890 is a wasteful number, since it uses less digits than its factorization.

25465890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 25465890 is about 5046.3739457159. The cubic root of 25465890 is about 294.2069670444.

The spelling of 25465890 in words is "twenty-five million, four hundred sixty-five thousand, eight hundred ninety".