2780500305 has 16 divisors (see below), whose sum is σ = 4853237184. Its totient is φ = 1348121280.

The previous prime is 2780500279. The next prime is 2780500343. The reversal of 2780500305 is 5030050872.

It is a happy number.

It is not a de Polignac number, because 2780500305 - 2⁵ = 2780500273 is a prime.

It is a super-2 number, since 2×2780500305² = 15462363892210186050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8425594 + ... + 8425923.

It is an arithmetic number, because the mean of its divisors is an integer number (303327324).

Almost surely, 2^2780500305 is an apocalyptic number.

It is an amenable number.

2780500305 is a deficient number, since it is larger than the sum of its proper divisors (2072736879).

2780500305 is a wasteful number, since it uses less digits than its factorization.

2780500305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16851536.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 2780500305 is about 52730.4495050061. The cubic root of 2780500305 is about 1406.1802125565.

The spelling of 2780500305 in words is "two billion, seven hundred eighty million, five hundred thousand, three hundred five".