28270633 has 4 divisors (see below), whose sum is σ = 28734148. Its totient is φ = 27807120.

The previous prime is 28270603. The next prime is 28270639. The reversal of 28270633 is 33607282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 896809 + 27373824 = 947^2 + 5232^2 .

It is a cyclic number.

It is not a de Polignac number, because 28270633 - 2¹⁷ = 28139561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28270595 and 28270604.

It is not an unprimeable number, because it can be changed into a prime (28270639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231666 + ... + 231787.

It is an arithmetic number, because the mean of its divisors is an integer number (7183537).

Almost surely, 2^28270633 is an apocalyptic number.

It is an amenable number.

28270633 is a deficient number, since it is larger than the sum of its proper divisors (463515).

28270633 is an equidigital number, since it uses as much as digits as its factorization.

28270633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463514.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 28270633 is about 5317.0135414535. The cubic root of 28270633 is about 304.6340967268.

The spelling of 28270633 in words is "twenty-eight million, two hundred seventy thousand, six hundred thirty-three".