25428679 has 4 divisors (see below), whose sum is σ = 26305560. Its totient is φ = 24551800.

The previous prime is 25428677. The next prime is 25428703. The reversal of 25428679 is 97682452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25428679 - 2¹ = 25428677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25428671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438397 + ... + 438454.

It is an arithmetic number, because the mean of its divisors is an integer number (6576390).

Almost surely, 2^25428679 is an apocalyptic number.

25428679 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

25428679 is a deficient number, since it is larger than the sum of its proper divisors (876881).

25428679 is an equidigital number, since it uses as much as digits as its factorization.

25428679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876880.

The product of its digits is 241920, while the sum is 43.

The square root of 25428679 is about 5042.6856931599. The cubic root of 25428679 is about 294.0635978540.

The spelling of 25428679 in words is "twenty-five million, four hundred twenty-eight thousand, six hundred seventy-nine".