2009102780 has 12 divisors (see below), whose sum is σ = 4219115880. Its totient is φ = 803641104.

The previous prime is 2009102773. The next prime is 2009102873. The reversal of 2009102780 is 872019002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50227550 + ... + 50227589.

It is an arithmetic number, because the mean of its divisors is an integer number (351592990).

Almost surely, 2^2009102780 is an apocalyptic number.

2009102780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2009102780 is an abundant number, since it is smaller than the sum of its proper divisors (2210013100).

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

2009102780 is a wasteful number, since it uses less digits than its factorization.

2009102780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100455148 (or 100455146 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 2009102780 is about 44823.0161858838. The cubic root of 2009102780 is about 1261.8296212884.

The spelling of 2009102780 in words is "two billion, nine million, one hundred two thousand, seven hundred eighty".