25890516 has 60 divisors (see below), whose sum is σ = 69369300. Its totient is φ = 8415360.

The previous prime is 25890493. The next prime is 25890517. The reversal of 25890516 is 61509852.

It is a happy number.

25890516 is a `hidden beast` number, since 2 + 58 + 90 + 516 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9922500 + 15968016 = 3150^2 + 3996^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25890517) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12310 + ... + 14258.

It is an arithmetic number, because the mean of its divisors is an integer number (1156155).

Almost surely, 2^25890516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25890516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34684650).

25890516 is an abundant number, since it is smaller than the sum of its proper divisors (43478784).

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

25890516 is a wasteful number, since it uses less digits than its factorization.

25890516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006 (or 1995 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 25890516 is about 5088.2723983686. The cubic root of 25890516 is about 295.8331936961.

The spelling of 25890516 in words is "twenty-five million, eight hundred ninety thousand, five hundred sixteen".