2820955660 has 24 divisors (see below), whose sum is σ = 6061776336. Its totient is φ = 1102140480.

The previous prime is 2820955619. The next prime is 2820955663. The reversal of 2820955660 is 665590282.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (2820955663) 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, 1639231 + ... + 1640950.

It is an arithmetic number, because the mean of its divisors is an integer number (252574014).

Almost surely, 2^2820955660 is an apocalyptic number.

2820955660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2820955660 is an abundant number, since it is smaller than the sum of its proper divisors (3240820676).

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

2820955660 is a wasteful number, since it uses less digits than its factorization.

2820955660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280233 (or 3280231 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 2820955660 is about 53112.6694866677. The cubic root of 2820955660 is about 1412.9672201737.

The spelling of 2820955660 in words is "two billion, eight hundred twenty million, nine hundred fifty-five thousand, six hundred sixty".