28777292 has 6 divisors (see below), whose sum is σ = 50360268. Its totient is φ = 14388644.

The previous prime is 28777291. The next prime is 28777297. The reversal of 28777292 is 29277782.

It is not an unprimeable number, because it can be changed into a prime (28777291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3597158 + ... + 3597165.

It is an arithmetic number, because the mean of its divisors is an integer number (8393378).

Almost surely, 2^28777292 is an apocalyptic number.

It is an amenable number.

28777292 is a deficient number, since it is larger than the sum of its proper divisors (21582976).

28777292 is a wasteful number, since it uses less digits than its factorization.

28777292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7194327 (or 7194325 counting only the distinct ones).

The product of its digits is 197568, while the sum is 44.

The square root of 28777292 is about 5364.4470358090. The cubic root of 28777292 is about 306.4431899477.

The spelling of 28777292 in words is "twenty-eight million, seven hundred seventy-seven thousand, two hundred ninety-two".