25028689 has 8 divisors (see below), whose sum is σ = 28867520. Its totient is φ = 21255696.

The previous prime is 25028659. The next prime is 25028723. The reversal of 25028689 is 98682052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25028689 - 2⁵ = 25028657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25028629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15639 + ... + 17164.

It is an arithmetic number, because the mean of its divisors is an integer number (3608440).

Almost surely, 2^25028689 is an apocalyptic number.

It is an amenable number.

25028689 is a deficient number, since it is larger than the sum of its proper divisors (3838831).

25028689 is a wasteful number, since it uses less digits than its factorization.

25028689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32919.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 25028689 is about 5002.8680774132. The cubic root of 25028689 is about 292.5135805904.

The spelling of 25028689 in words is "twenty-five million, twenty-eight thousand, six hundred eighty-nine".