25985390 has 32 divisors (see below), whose sum is σ = 48746880. Its totient is φ = 9964800.

The previous prime is 25985357. The next prime is 25985411. The reversal of 25985390 is 9358952.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24491 + ... + 25529.

It is an arithmetic number, because the mean of its divisors is an integer number (1523340).

Almost surely, 2^25985390 is an apocalyptic number.

25985390 is a deficient number, since it is larger than the sum of its proper divisors (22761490).

25985390 is a wasteful number, since it uses less digits than its factorization.

25985390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 25985390 is about 5097.5866839123. The cubic root of 25985390 is about 296.1941066136.

The spelling of 25985390 in words is "twenty-five million, nine hundred eighty-five thousand, three hundred ninety".