2780252766 has 24 divisors (see below), whose sum is σ = 6034602600. Its totient is φ = 925101456.

The previous prime is 2780252687. The next prime is 2780252773. The reversal of 2780252766 is 6672520872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127041 + ... + 147308.

It is an arithmetic number, because the mean of its divisors is an integer number (251441775).

Almost surely, 2^2780252766 is an apocalyptic number.

2780252766 is an abundant number, since it is smaller than the sum of its proper divisors (3254349834).

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

2780252766 is a wasteful number, since it uses less digits than its factorization.

2780252766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274920 (or 274917 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 2780252766 is about 52728.1022415941. The cubic root of 2780252766 is about 1406.1384820841.

The spelling of 2780252766 in words is "two billion, seven hundred eighty million, two hundred fifty-two thousand, seven hundred sixty-six".