428772866 has 8 divisors (see below), whose sum is σ = 658116624. Its totient is φ = 209400660.

The previous prime is 428772863. The next prime is 428772871. The reversal of 428772866 is 668277824.

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

It is not an unprimeable number, because it can be changed into a prime (428772863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2492780 + ... + 2492951.

It is an arithmetic number, because the mean of its divisors is an integer number (82264578).

Almost surely, 2^428772866 is an apocalyptic number.

428772866 is a deficient number, since it is larger than the sum of its proper divisors (229343758).

428772866 is a wasteful number, since it uses less digits than its factorization.

428772866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985776.

The product of its digits is 1806336, while the sum is 50.

The square root of 428772866 is about 20706.8313848353. The cubic root of 428772866 is about 754.0655462534.

The spelling of 428772866 in words is "four hundred twenty-eight million, seven hundred seventy-two thousand, eight hundred sixty-six".