28364732 has 12 divisors (see below), whose sum is σ = 54150936. Its totient is φ = 12893040.

The previous prime is 28364731. The next prime is 28364747. The reversal of 28364732 is 23746382.

28364732 is nontrivially palindromic in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 28364692 and 28364701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28364731) 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, 322283 + ... + 322370.

It is an arithmetic number, because the mean of its divisors is an integer number (4512578).

Almost surely, 2^28364732 is an apocalyptic number.

28364732 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28364732 is a deficient number, since it is larger than the sum of its proper divisors (25786204).

28364732 is a wasteful number, since it uses less digits than its factorization.

28364732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644668 (or 644666 counting only the distinct ones).

The product of its digits is 48384, while the sum is 35.

The square root of 28364732 is about 5325.8550487222. The cubic root of 28364732 is about 304.9717146572.

The spelling of 28364732 in words is "twenty-eight million, three hundred sixty-four thousand, seven hundred thirty-two".