25489990 has 16 divisors (see below), whose sum is σ = 46086480. Its totient is φ = 10150560.

The previous prime is 25489969. The next prime is 25489999. The reversal of 25489990 is 9998452.

It is a self number, because there is not a number n which added to its sum of digits gives 25489990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25489999) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3276 + ... + 7855.

It is an arithmetic number, because the mean of its divisors is an integer number (2880405).

Almost surely, 2^25489990 is an apocalyptic number.

25489990 is a deficient number, since it is larger than the sum of its proper divisors (20596490).

25489990 is a wasteful number, since it uses less digits than its factorization.

25489990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11367.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 25489990 is about 5048.7612342039. The cubic root of 25489990 is about 294.2997467376.

The spelling of 25489990 in words is "twenty-five million, four hundred eighty-nine thousand, nine hundred ninety".