25428039 has 32 divisors (see below), whose sum is σ = 44190720. Its totient is φ = 12621312.

The previous prime is 25428037. The next prime is 25428043. The reversal of 25428039 is 93082452.

It is a happy number.

It is not a de Polignac number, because 25428039 - 2¹ = 25428037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25428037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1902 + ... + 7380.

It is an arithmetic number, because the mean of its divisors is an integer number (1380960).

Almost surely, 2^25428039 is an apocalyptic number.

25428039 is a deficient number, since it is larger than the sum of its proper divisors (18762681).

25428039 is a wasteful number, since it uses less digits than its factorization.

25428039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5519.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 25428039 is about 5042.6222345125. The cubic root of 25428039 is about 294.0611307933.

The spelling of 25428039 in words is "twenty-five million, four hundred twenty-eight thousand, thirty-nine".