28062251 has 6 divisors (see below), whose sum is σ = 32643900. Its totient is φ = 24053316.

The previous prime is 28062239. The next prime is 28062271. The reversal of 28062251 is 15226082.

It is not a de Polignac number, because 28062251 - 2¹⁸ = 27800107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28062251.

It is not an unprimeable number, because it can be changed into a prime (28062271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 286301 + ... + 286398.

It is an arithmetic number, because the mean of its divisors is an integer number (5440650).

Almost surely, 2^28062251 is an apocalyptic number.

28062251 is a deficient number, since it is larger than the sum of its proper divisors (4581649).

28062251 is an equidigital number, since it uses as much as digits as its factorization.

28062251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572713 (or 572706 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 28062251 is about 5297.3815229791. The cubic root of 28062251 is about 303.8837671701.

The spelling of 28062251 in words is "twenty-eight million, sixty-two thousand, two hundred fifty-one".