428787781841 has 8 divisors (see below), whose sum is σ = 429948637920. Its totient is φ = 427627081728.

The previous prime is 428787781837. The next prime is 428787781847. The reversal of 428787781841 is 148187787824.

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 428787781841 - 2² = 428787781837 is a prime.

It is a super-2 number, since 2×428787781841² (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 (428787781847) 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, 7345130 + ... + 7403276.

It is an arithmetic number, because the mean of its divisors is an integer number (53743579740).

Almost surely, 2^428787781841 is an apocalyptic number.

It is an amenable number.

428787781841 is a deficient number, since it is larger than the sum of its proper divisors (1160856079).

428787781841 is a wasteful number, since it uses less digits than its factorization.

428787781841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77983.

The product of its digits is 44957696, while the sum is 65.

The spelling of 428787781841 in words is "four hundred twenty-eight billion, seven hundred eighty-seven million, seven hundred eighty-one thousand, eight hundred forty-one".