2806138578 has 16 divisors (see below), whose sum is σ = 5627914560. Its totient is φ = 932773296.

The previous prime is 2806138561. The next prime is 2806138603. The reversal of 2806138578 is 8758316082.

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, 649225 + ... + 653532.

It is an arithmetic number, because the mean of its divisors is an integer number (351744660).

Almost surely, 2^2806138578 is an apocalyptic number.

2806138578 is an abundant number, since it is smaller than the sum of its proper divisors (2821775982).

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

2806138578 is a wasteful number, since it uses less digits than its factorization.

2806138578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303121.

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 2806138578 is about 52972.9985747456. The cubic root of 2806138578 is about 1410.4890039711.

The spelling of 2806138578 in words is "two billion, eight hundred six million, one hundred thirty-eight thousand, five hundred seventy-eight".