428021086747 has 4 divisors (see below), whose sum is σ = 435037825936. Its totient is φ = 421004347560.

The previous prime is 428021086739. The next prime is 428021086763. The reversal of 428021086747 is 747680120824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428021086747 - 2³ = 428021086739 is a prime.

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 428021086747.

It is not an unprimeable number, because it can be changed into a prime (428021083747) 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 3 ways as a sum of consecutive naturals, for example, 3508369503 + ... + 3508369624.

It is an arithmetic number, because the mean of its divisors is an integer number (108759456484).

Almost surely, 2^428021086747 is an apocalyptic number.

428021086747 is a deficient number, since it is larger than the sum of its proper divisors (7016739189).

428021086747 is an equidigital number, since it uses as much as digits as its factorization.

428021086747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7016739188.

The product of its (nonzero) digits is 1204224, while the sum is 49.

The spelling of 428021086747 in words is "four hundred twenty-eight billion, twenty-one million, eighty-six thousand, seven hundred forty-seven".