28861833 has 48 divisors (see below), whose sum is σ = 52629696. Its totient is φ = 13829760.

The previous prime is 28861831. The next prime is 28861843. The reversal of 28861833 is 33816882.

It is not a de Polignac number, because 28861833 - 2¹ = 28861831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 28861791 and 28861800.

It is not an unprimeable number, because it can be changed into a prime (28861831) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20335 + ... + 21707.

It is an arithmetic number, because the mean of its divisors is an integer number (1096452).

Almost surely, 2^28861833 is an apocalyptic number.

It is an amenable number.

28861833 is a deficient number, since it is larger than the sum of its proper divisors (23767863).

28861833 is a wasteful number, since it uses less digits than its factorization.

28861833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414 (or 1407 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 28861833 is about 5372.3210067903. The cubic root of 28861833 is about 306.7429828707.

28861833 divided by its sum of digits (39) gives a palindrome (740047).

The spelling of 28861833 in words is "twenty-eight million, eight hundred sixty-one thousand, eight hundred thirty-three".