28740830 has 16 divisors (see below), whose sum is σ = 52443504. Its totient is φ = 11338560.

The previous prime is 28740799. The next prime is 28740851. The reversal of 28740830 is 3804782.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18956 + ... + 20415.

It is an arithmetic number, because the mean of its divisors is an integer number (3277719).

Almost surely, 2^28740830 is an apocalyptic number.

28740830 is a deficient number, since it is larger than the sum of its proper divisors (23702674).

28740830 is a wasteful number, since it uses less digits than its factorization.

28740830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39451.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28740830 is about 5361.0474722763. The cubic root of 28740830 is about 306.3137099163.

The spelling of 28740830 in words is "twenty-eight million, seven hundred forty thousand, eight hundred thirty".