25839430 has 64 divisors (see below), whose sum is σ = 52254720. Its totient is φ = 9158400.

The previous prime is 25839427. The next prime is 25839479. The reversal of 25839430 is 3493852.

It is a happy number.

It is a super-2 number, since 2×25839430² = 1335352285449800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 31 ways as a sum of consecutive naturals, for example, 241437 + ... + 241543.

It is an arithmetic number, because the mean of its divisors is an integer number (816480).

Almost surely, 2^25839430 is an apocalyptic number.

25839430 is the 2542-nd decagonal number.

25839430 is an abundant number, since it is smaller than the sum of its proper divisors (26415290).

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

25839430 is a wasteful number, since it uses less digits than its factorization.

25839430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 25839430 is about 5083.2499446712. The cubic root of 25839430 is about 295.6384906692.

The spelling of 25839430 in words is "twenty-five million, eight hundred thirty-nine thousand, four hundred thirty".