428872766 has 32 divisors (see below), whose sum is σ = 768821760. Its totient is φ = 175434336.

The previous prime is 428872757. The next prime is 428872781. The reversal of 428872766 is 667278824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187880 + ... + 190148.

It is an arithmetic number, because the mean of its divisors is an integer number (24025680).

Almost surely, 2^428872766 is an apocalyptic number.

428872766 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

428872766 is a deficient number, since it is larger than the sum of its proper divisors (339948994).

428872766 is a wasteful number, since it uses less digits than its factorization.

428872766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888.

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

The square root of 428872766 is about 20709.2434917358. The cubic root of 428872766 is about 754.1241050727.

The spelling of 428872766 in words is "four hundred twenty-eight million, eight hundred seventy-two thousand, seven hundred sixty-six".