28343777 has 32 divisors (see below), whose sum is σ = 38154240. Its totient is φ = 20378880.

The previous prime is 28343767. The next prime is 28343789. The reversal of 28343777 is 77734382.

It is a cyclic number.

It is not a de Polignac number, because 28343777 - 2¹⁴ = 28327393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28343717) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77048 + ... + 77414.

It is an arithmetic number, because the mean of its divisors is an integer number (1192320).

Almost surely, 2^28343777 is an apocalyptic number.

It is an amenable number.

28343777 is a deficient number, since it is larger than the sum of its proper divisors (9810463).

28343777 is a wasteful number, since it uses less digits than its factorization.

28343777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461.

The product of its digits is 197568, while the sum is 41.

The square root of 28343777 is about 5323.8873955034. The cubic root of 28343777 is about 304.8965948844.

The spelling of 28343777 in words is "twenty-eight million, three hundred forty-three thousand, seven hundred seventy-seven".