428724059681 has 8 divisors (see below), whose sum is σ = 430895264928. Its totient is φ = 426558132000.

The previous prime is 428724059677. The next prime is 428724059719. The reversal of 428724059681 is 186950427824.

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 428724059681 - 2² = 428724059677 is a prime.

It is a super-2 number, since 2×428724059681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428424059681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1156460 + ... + 1481501.

It is an arithmetic number, because the mean of its divisors is an integer number (53861908116).

Almost surely, 2^428724059681 is an apocalyptic number.

It is an amenable number.

428724059681 is a deficient number, since it is larger than the sum of its proper divisors (2171205247).

428724059681 is a wasteful number, since it uses less digits than its factorization.

428724059681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638783.

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 428724059681 in words is "four hundred twenty-eight billion, seven hundred twenty-four million, fifty-nine thousand, six hundred eighty-one".