28779406 has 8 divisors (see below), whose sum is σ = 43287840. Its totient is φ = 14350128.

The previous prime is 28779391. The next prime is 28779431. The reversal of 28779406 is 60497782.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18871 + ... + 20338.

It is an arithmetic number, because the mean of its divisors is an integer number (5410980).

Almost surely, 2^28779406 is an apocalyptic number.

28779406 is a deficient number, since it is larger than the sum of its proper divisors (14508434).

28779406 is a wasteful number, since it uses less digits than its factorization.

28779406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39578.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 28779406 is about 5364.6440702063. The cubic root of 28779406 is about 306.4506936077.

The spelling of 28779406 in words is "twenty-eight million, seven hundred seventy-nine thousand, four hundred six".