2146785780 has 24 divisors (see below), whose sum is σ = 6011000352. Its totient is φ = 572476192.

The previous prime is 2146785763. The next prime is 2146785811. The reversal of 2146785780 is 875876412.

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, 17889822 + ... + 17889941.

It is an arithmetic number, because the mean of its divisors is an integer number (250458348).

Almost surely, 2^2146785780 is an apocalyptic number.

2146785780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2146785780 is an abundant number, since it is smaller than the sum of its proper divisors (3864214572).

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

2146785780 is a wasteful number, since it uses less digits than its factorization.

2146785780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35779775 (or 35779773 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 48.

The square root of 2146785780 is about 46333.4196881689. The cubic root of 2146785780 is about 1290.0193855629.

The spelling of 2146785780 in words is "two billion, one hundred forty-six million, seven hundred eighty-five thousand, seven hundred eighty".