28777742 has 16 divisors (see below), whose sum is σ = 51930240. Its totient is φ = 11684088.

The previous prime is 28777739. The next prime is 28777769. The reversal of 28777742 is 24777782.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 28777693 and 28777702.

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, 53828 + ... + 54359.

It is an arithmetic number, because the mean of its divisors is an integer number (3245640).

Almost surely, 2^28777742 is an apocalyptic number.

28777742 is a deficient number, since it is larger than the sum of its proper divisors (23152498).

28777742 is a wasteful number, since it uses less digits than its factorization.

28777742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108215.

The product of its digits is 307328, while the sum is 44.

The square root of 28777742 is about 5364.4889784582. The cubic root of 28777742 is about 306.4447872571. Note that the first 3 decimals are identical.

The spelling of 28777742 in words is "twenty-eight million, seven hundred seventy-seven thousand, seven hundred forty-two".