216773828 has 6 divisors (see below), whose sum is σ = 379354206. Its totient is φ = 108386912.

The previous prime is 216773807. The next prime is 216773857. The reversal of 216773828 is 828377612.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 143808064 + 72965764 = 11992^2 + 8542^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27096725 + ... + 27096732.

It is an arithmetic number, because the mean of its divisors is an integer number (63225701).

Almost surely, 2^216773828 is an apocalyptic number.

It is an amenable number.

216773828 is a deficient number, since it is larger than the sum of its proper divisors (162580378).

216773828 is a wasteful number, since it uses less digits than its factorization.

216773828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54193461 (or 54193459 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 216773828 is about 14723.2410834028. The cubic root of 216773828 is about 600.7156534682.

The spelling of 216773828 in words is "two hundred sixteen million, seven hundred seventy-three thousand, eight hundred twenty-eight".