28409253 has 8 divisors (see below), whose sum is σ = 37917600. Its totient is φ = 18920208.

The previous prime is 28409243. The next prime is 28409257. The reversal of 28409253 is 35290482.

It is a happy number.

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

It is not a de Polignac number, because 28409253 - 2⁵ = 28409221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28409257) 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, 943 + ... + 7596.

It is an arithmetic number, because the mean of its divisors is an integer number (4739700).

Almost surely, 2^28409253 is an apocalyptic number.

It is an amenable number.

28409253 is a deficient number, since it is larger than the sum of its proper divisors (9508347).

28409253 is a wasteful number, since it uses less digits than its factorization.

28409253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9651.

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

The square root of 28409253 is about 5330.0331143437. The cubic root of 28409253 is about 305.1311914342.

The spelling of 28409253 in words is "twenty-eight million, four hundred nine thousand, two hundred fifty-three".