2780267538 has 8 divisors (see below), whose sum is σ = 5560535088. Its totient is φ = 926755844.

The previous prime is 2780267527. The next prime is 2780267543. The reversal of 2780267538 is 8357620872.

It is a sphenic number, since it is the product of 3 distinct primes.

2780267538 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231688956 + ... + 231688967.

It is an arithmetic number, because the mean of its divisors is an integer number (695066886).

Almost surely, 2^2780267538 is an apocalyptic number.

2780267538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2780267538 is a wasteful number, since it uses less digits than its factorization.

2780267538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463377928.

The product of its (nonzero) digits is 1128960, while the sum is 48.

The square root of 2780267538 is about 52728.2423185147. The cubic root of 2780267538 is about 1406.1409724381.

The spelling of 2780267538 in words is "two billion, seven hundred eighty million, two hundred sixty-seven thousand, five hundred thirty-eight".