8428099505840 has 80 divisors (see below), whose sum is σ = 22396555748928. Its totient is φ = 2889390071808.

The previous prime is 8428099505831. The next prime is 8428099505849. The reversal of 8428099505840 is 485059908248.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8428099505831) and next prime (8428099505849).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×8428099505840² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8428099505849) 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, 6064124 + ... + 7323236.

Almost surely, 2^{8428099505840} is an apocalyptic number.

8428099505840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8428099505840 is an abundant number, since it is smaller than the sum of its proper divisors (13968456243088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8428099505840 is a wasteful number, since it uses less digits than its factorization.

8428099505840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271086 (or 1271080 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 62.

The spelling of 8428099505840 in words is "eight trillion, four hundred twenty-eight billion, ninety-nine million, five hundred five thousand, eight hundred forty".