28777942 has 8 divisors (see below), whose sum is σ = 43203600. Its totient is φ = 14376744.

The previous prime is 28777939. The next prime is 28777961. The reversal of 28777942 is 24977782.

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

It is a junction number, because it is equal to n+sod(n) for n = 28777892 and 28777901.

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, 2817 + ... + 8092.

It is an arithmetic number, because the mean of its divisors is an integer number (5400450).

Almost surely, 2^28777942 is an apocalyptic number.

28777942 is a deficient number, since it is larger than the sum of its proper divisors (14425658).

28777942 is a wasteful number, since it uses less digits than its factorization.

28777942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12230.

The product of its digits is 395136, while the sum is 46.

The square root of 28777942 is about 5364.5076195304. The cubic root of 28777942 is about 306.4454971671.

The spelling of 28777942 in words is "twenty-eight million, seven hundred seventy-seven thousand, nine hundred forty-two".