428687751 has 16 divisors (see below), whose sum is σ = 581068800. Its totient is φ = 281087520.

The previous prime is 428687737. The next prime is 428687767. The reversal of 428687751 is 157786824.

It is not a de Polignac number, because 428687751 - 2¹⁸ = 428425607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428687751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428687711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41386 + ... + 50696.

It is an arithmetic number, because the mean of its divisors is an integer number (36316800).

Almost surely, 2^428687751 is an apocalyptic number.

428687751 is a deficient number, since it is larger than the sum of its proper divisors (152381049).

428687751 is a wasteful number, since it uses less digits than its factorization.

428687751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9566.

The product of its digits is 752640, while the sum is 48.

The square root of 428687751 is about 20704.7760432225. The cubic root of 428687751 is about 754.0156468456.

The spelling of 428687751 in words is "four hundred twenty-eight million, six hundred eighty-seven thousand, seven hundred fifty-one".