2809012940 has 12 divisors (see below), whose sum is σ = 5898927216. Its totient is φ = 1123605168.

The previous prime is 2809012933. The next prime is 2809012963. The reversal of 2809012940 is 492109082.

2809012940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2809012940.

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, 70225304 + ... + 70225343.

It is an arithmetic number, because the mean of its divisors is an integer number (491577268).

Almost surely, 2^2809012940 is an apocalyptic number.

2809012940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2809012940 is an abundant number, since it is smaller than the sum of its proper divisors (3089914276).

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

2809012940 is a wasteful number, since it uses less digits than its factorization.

2809012940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140450656 (or 140450654 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 2809012940 is about 53000.1220753311. The cubic root of 2809012940 is about 1410.9704333320.

The spelling of 2809012940 in words is "two billion, eight hundred nine million, twelve thousand, nine hundred forty".