28303869 has 32 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 16184960.

The previous prime is 28303831. The next prime is 28303871. The reversal of 28303869 is 96830382.

It is not a de Polignac number, because 28303869 - 2⁷ = 28303741 is a prime.

It is a super-2 number, since 2×28303869² = 1602218000738322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28303879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67342 + ... + 67760.

It is an arithmetic number, because the mean of its divisors is an integer number (1360800).

Almost surely, 2^28303869 is an apocalyptic number.

It is an amenable number.

28303869 is a deficient number, since it is larger than the sum of its proper divisors (15241731).

28303869 is a wasteful number, since it uses less digits than its factorization.

28303869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 28303869 is about 5320.1380621183. The cubic root of 28303869 is about 304.7534296723.

The spelling of 28303869 in words is "twenty-eight million, three hundred three thousand, eight hundred sixty-nine".