2780780670 has 48 divisors (see below), whose sum is σ = 7267536432. Its totient is φ = 737694720.

The previous prime is 2780780657. The next prime is 2780780671. The reversal of 2780780670 is 760870872.

It is a super-2 number, since 2×2780780670² = 15465482269291297800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780780671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62676 + ... + 97415.

It is an arithmetic number, because the mean of its divisors is an integer number (151407009).

Almost surely, 2^2780780670 is an apocalyptic number.

2780780670 is an abundant number, since it is smaller than the sum of its proper divisors (4486755762).

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

2780780670 is a wasteful number, since it uses less digits than its factorization.

2780780670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160297 (or 160294 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The square root of 2780780670 is about 52733.1079114440. The cubic root of 2780780670 is about 1406.2274738910.

The spelling of 2780780670 in words is "two billion, seven hundred eighty million, seven hundred eighty thousand, six hundred seventy".