428776803 has 72 divisors (see below), whose sum is σ = 802947600. Its totient is φ = 218284416.

The previous prime is 428776801. The next prime is 428776807. The reversal of 428776803 is 308677824.

It is a happy number.

It is not a de Polignac number, because 428776803 - 2¹ = 428776801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428776801) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 164968 + ... + 167546.

It is an arithmetic number, because the mean of its divisors is an integer number (11152050).

Almost surely, 2^428776803 is an apocalyptic number.

428776803 is a deficient number, since it is larger than the sum of its proper divisors (374170797).

428776803 is a wasteful number, since it uses less digits than its factorization.

428776803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641 (or 2631 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 428776803 is about 20706.9264498621. The cubic root of 428776803 is about 754.0678541941.

The spelling of 428776803 in words is "four hundred twenty-eight million, seven hundred seventy-six thousand, eight hundred three".