25634690 has 16 divisors (see below), whose sum is σ = 46259640. Its totient is φ = 10227840.

The previous prime is 25634689. The next prime is 25634699. The reversal of 25634690 is 9643652.

It can be written as a sum of positive squares in 4 ways, for example, as 8254129 + 17380561 = 2873^2 + 4169^2 .

It is a super-3 number, since 3×25634690³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 25634690.

It is not an unprimeable number, because it can be changed into a prime (25634699) 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, 1166 + ... + 7254.

Almost surely, 2^25634690 is an apocalyptic number.

25634690 is a deficient number, since it is larger than the sum of its proper divisors (20624950).

25634690 is a wasteful number, since it uses less digits than its factorization.

25634690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6517.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 25634690 is about 5063.0712023435. The cubic root of 25634690 is about 294.8555838185.

The spelling of 25634690 in words is "twenty-five million, six hundred thirty-four thousand, six hundred ninety".