28328734 has 32 divisors (see below), whose sum is σ = 51436800. Its totient is φ = 11430720.

The previous prime is 28328731. The next prime is 28328767. The reversal of 28328734 is 43782382.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28328693 and 28328702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28328731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74557 + ... + 74935.

It is an arithmetic number, because the mean of its divisors is an integer number (1607400).

Almost surely, 2^28328734 is an apocalyptic number.

28328734 is a deficient number, since it is larger than the sum of its proper divisors (23108066).

28328734 is a wasteful number, since it uses less digits than its factorization.

28328734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688.

The product of its digits is 64512, while the sum is 37.

The square root of 28328734 is about 5322.4744245510. The cubic root of 28328734 is about 304.8426456979.

The spelling of 28328734 in words is "twenty-eight million, three hundred twenty-eight thousand, seven hundred thirty-four".