2102840280 has 48 divisors (see below), whose sum is σ = 6834232080. Its totient is φ = 560757312.

The previous prime is 2102840261. The next prime is 2102840323. The reversal of 2102840280 is 820482012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2920252 + ... + 2920971.

It is an arithmetic number, because the mean of its divisors is an integer number (142379835).

Almost surely, 2^2102840280 is an apocalyptic number.

2102840280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102840280 is an abundant number, since it is smaller than the sum of its proper divisors (4731391800).

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

2102840280 is a wasteful number, since it uses less digits than its factorization.

2102840280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5841240 (or 5841233 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 2102840280 is about 45856.7364734997. The cubic root of 2102840280 is about 1281.1562387703.

The spelling of 2102840280 in words is "two billion, one hundred two million, eight hundred forty thousand, two hundred eighty".