28743830 has 16 divisors (see below), whose sum is σ = 51827904. Its totient is φ = 11477760.

The previous prime is 28743817. The next prime is 28743877. The reversal of 28743830 is 3834782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4595 + ... + 8865.

It is an arithmetic number, because the mean of its divisors is an integer number (3239244).

Almost surely, 2^28743830 is an apocalyptic number.

28743830 is a deficient number, since it is larger than the sum of its proper divisors (23084074).

28743830 is a wasteful number, since it uses less digits than its factorization.

28743830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4951.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 28743830 is about 5361.3272610427. The cubic root of 28743830 is about 306.3243673347.

The spelling of 28743830 in words is "twenty-eight million, seven hundred forty-three thousand, eight hundred thirty".