428764791 has 32 divisors (see below), whose sum is σ = 715176448. Its totient is φ = 222445440.

The previous prime is 428764789. The next prime is 428764793. The reversal of 428764791 is 197467824.

It is an interprime number because it is at equal distance from previous prime (428764789) and next prime (428764793).

It is not a de Polignac number, because 428764791 - 2¹ = 428764789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428764791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428764793) 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, 3780 + ... + 29526.

It is an arithmetic number, because the mean of its divisors is an integer number (22349264).

Almost surely, 2^428764791 is an apocalyptic number.

428764791 is a deficient number, since it is larger than the sum of its proper divisors (286411657).

428764791 is a wasteful number, since it uses less digits than its factorization.

428764791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25831.

The product of its digits is 677376, while the sum is 48.

The square root of 428764791 is about 20706.6363999564. The cubic root of 428764791 is about 754.0608124981.

The spelling of 428764791 in words is "four hundred twenty-eight million, seven hundred sixty-four thousand, seven hundred ninety-one".