2002780788 has 24 divisors (see below), whose sum is σ = 4675262592. Its totient is φ = 667292544.

The previous prime is 2002780781. The next prime is 2002780811. The reversal of 2002780788 is 8870872002.

It is a super-2 number, since 2×2002780788² = 8022261769563801888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002780781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9045 + ... + 63932.

It is an arithmetic number, because the mean of its divisors is an integer number (194802608).

Almost surely, 2^2002780788 is an apocalyptic number.

It is an amenable number.

2002780788 is an abundant number, since it is smaller than the sum of its proper divisors (2672481804).

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

2002780788 is a wasteful number, since it uses less digits than its factorization.

2002780788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75271 (or 75269 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 42.

The square root of 2002780788 is about 44752.4389056060. The cubic root of 2002780788 is about 1260.5047083627.

The spelling of 2002780788 in words is "two billion, two million, seven hundred eighty thousand, seven hundred eighty-eight".