28706830 has 8 divisors (see below), whose sum is σ = 51672312. Its totient is φ = 11482728.

The previous prime is 28706819. The next prime is 28706833. The reversal of 28706830 is 3860782.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28706833) 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, 1435332 + ... + 1435351.

It is an arithmetic number, because the mean of its divisors is an integer number (6459039).

Almost surely, 2^28706830 is an apocalyptic number.

28706830 is a deficient number, since it is larger than the sum of its proper divisors (22965482).

28706830 is a wasteful number, since it uses less digits than its factorization.

28706830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870690.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28706830 is about 5357.8755118050. The cubic root of 28706830 is about 306.1928739761.

The spelling of 28706830 in words is "twenty-eight million, seven hundred six thousand, eight hundred thirty".