25887790 has 48 divisors (see below), whose sum is σ = 50246784. Its totient is φ = 9590400.

The previous prime is 25887781. The next prime is 25887791. The reversal of 25887790 is 9778852.

It is a self number, because there is not a number n which added to its sum of digits gives 25887790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25887791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 424360 + ... + 424420.

It is an arithmetic number, because the mean of its divisors is an integer number (1046808).

Almost surely, 2^25887790 is an apocalyptic number.

25887790 is a deficient number, since it is larger than the sum of its proper divisors (24358994).

25887790 is a wasteful number, since it uses less digits than its factorization.

25887790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 25887790 is about 5088.0045204382. The cubic root of 25887790 is about 295.8228106200.

Subtracting from 25887790 its sum of digits (46), we obtain a square (25887744 = 5088²).

The spelling of 25887790 in words is "twenty-five million, eight hundred eighty-seven thousand, seven hundred ninety".