28255251 has 8 divisors (see below), whose sum is σ = 38972880. Its totient is φ = 18187232.

The previous prime is 28255237. The next prime is 28255267. The reversal of 28255251 is 15255282.

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

It is a cyclic number.

It is not a de Polignac number, because 28255251 - 2⁶ = 28255187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28255951) 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, 162300 + ... + 162473.

It is an arithmetic number, because the mean of its divisors is an integer number (4871610).

Almost surely, 2^28255251 is an apocalyptic number.

28255251 is a deficient number, since it is larger than the sum of its proper divisors (10717629).

28255251 is a wasteful number, since it uses less digits than its factorization.

28255251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324805.

The product of its digits is 8000, while the sum is 30.

The square root of 28255251 is about 5315.5668559430. The cubic root of 28255251 is about 304.5788364172.

The spelling of 28255251 in words is "twenty-eight million, two hundred fifty-five thousand, two hundred fifty-one".