428742831 has 16 divisors (see below), whose sum is σ = 633852288. Its totient is φ = 255583200.

The previous prime is 428742829. The next prime is 428742833. The reversal of 428742831 is 138247824.

It is an interprime number because it is at equal distance from previous prime (428742829) and next prime (428742833).

It is not a de Polignac number, because 428742831 - 2¹ = 428742829 is a prime.

It is a super-2 number, since 2×428742831² = 367640830267789122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 428742831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428742833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104481 + ... + 108506.

It is an arithmetic number, because the mean of its divisors is an integer number (39615768).

Almost surely, 2^428742831 is an apocalyptic number.

428742831 is a deficient number, since it is larger than the sum of its proper divisors (205109457).

428742831 is a wasteful number, since it uses less digits than its factorization.

428742831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213062.

The product of its digits is 86016, while the sum is 39.

The square root of 428742831 is about 20706.1061283864. The cubic root of 428742831 is about 754.0479387279.

The spelling of 428742831 in words is "four hundred twenty-eight million, seven hundred forty-two thousand, eight hundred thirty-one".