428894999831 has 8 divisors (see below), whose sum is σ = 436006875024. Its totient is φ = 421785731520.

The previous prime is 428894999791. The next prime is 428894999839. The reversal of 428894999831 is 138999498824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428894999831 - 2²² = 428890805527 is a prime.

It is a super-2 number, since 2×428894999831² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428894999839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318545 + ... + 979418.

It is an arithmetic number, because the mean of its divisors is an integer number (54500859378).

Almost surely, 2^428894999831 is an apocalyptic number.

428894999831 is a deficient number, since it is larger than the sum of its proper divisors (7111875193).

428894999831 is a wasteful number, since it uses less digits than its factorization.

428894999831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303441.

The product of its digits is 322486272, while the sum is 74.

The spelling of 428894999831 in words is "four hundred twenty-eight billion, eight hundred ninety-four million, nine hundred ninety-nine thousand, eight hundred thirty-one".