2780278508 has 24 divisors (see below), whose sum is σ = 5569603872. Its totient is φ = 1189609344.

The previous prime is 2780278489. The next prime is 2780278513. The reversal of 2780278508 is 8058720872.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

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, 63191 + ... + 97742.

It is an arithmetic number, because the mean of its divisors is an integer number (232066828).

Almost surely, 2^2780278508 is an apocalyptic number.

2780278508 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2780278508 is an abundant number, since it is smaller than the sum of its proper divisors (2789325364).

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

2780278508 is a wasteful number, since it uses less digits than its factorization.

2780278508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161561 (or 161559 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 47.

The square root of 2780278508 is about 52728.3463423612. The cubic root of 2780278508 is about 1406.1428218220.

The spelling of 2780278508 in words is "two billion, seven hundred eighty million, two hundred seventy-eight thousand, five hundred eight".