2809339401620 has 24 divisors (see below), whose sum is σ = 5899990108488. Its totient is φ = 1123663881600.

The previous prime is 2809339401619. The next prime is 2809339401653. The reversal of 2809339401620 is 261049339082.

It can be written as a sum of positive squares in 4 ways, for example, as 1193298433924 + 1616040967696 = 1092382^2 + 1271236^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4171391 + ... + 4797830.

It is an arithmetic number, because the mean of its divisors is an integer number (245832921187).

Almost surely, 2^{2809339401620} is an apocalyptic number.

2809339401620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2809339401620 is an abundant number, since it is smaller than the sum of its proper divisors (3090650706868).

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

2809339401620 is a wasteful number, since it uses less digits than its factorization.

2809339401620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8984891 (or 8984889 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 47.

The spelling of 2809339401620 in words is "two trillion, eight hundred nine billion, three hundred thirty-nine million, four hundred one thousand, six hundred twenty".