428931877 has 4 divisors (see below), whose sum is σ = 467925696. Its totient is φ = 389938060.

The previous prime is 428931869. The next prime is 428931887. The reversal of 428931877 is 778139824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 428931877 - 2³ = 428931869 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428931877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428931827) 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, 19496893 + ... + 19496914.

It is an arithmetic number, because the mean of its divisors is an integer number (116981424).

Almost surely, 2^428931877 is an apocalyptic number.

It is an amenable number.

428931877 is a deficient number, since it is larger than the sum of its proper divisors (38993819).

428931877 is a wasteful number, since it uses less digits than its factorization.

428931877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38993818.

The product of its digits is 677376, while the sum is 49.

The square root of 428931877 is about 20710.6706072015. The cubic root of 428931877 is about 754.1587501436.

The spelling of 428931877 in words is "four hundred twenty-eight million, nine hundred thirty-one thousand, eight hundred seventy-seven".