28933671 has 16 divisors (see below), whose sum is σ = 42076160. Its totient is φ = 17578080.

The previous prime is 28933669. The next prime is 28933673. The reversal of 28933671 is 17633982.

It is an interprime number because it is at equal distance from previous prime (28933669) and next prime (28933673).

It is not a de Polignac number, because 28933671 - 2¹ = 28933669 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28933673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1615 + ... + 7776.

It is an arithmetic number, because the mean of its divisors is an integer number (2629760).

Almost surely, 2^28933671 is an apocalyptic number.

28933671 is a deficient number, since it is larger than the sum of its proper divisors (13142489).

28933671 is a wasteful number, since it uses less digits than its factorization.

28933671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9486.

The product of its digits is 54432, while the sum is 39.

The square root of 28933671 is about 5379.0027886217. The cubic root of 28933671 is about 306.9972696196.

The spelling of 28933671 in words is "twenty-eight million, nine hundred thirty-three thousand, six hundred seventy-one".