2805378172 has 24 divisors (see below), whose sum is σ = 5199336576. Its totient is φ = 1321674288.

The previous prime is 2805378161. The next prime is 2805378223. The reversal of 2805378172 is 2718735082.

It is a super-3 number, since 3×2805378172³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

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, 221398 + ... + 233725.

It is an arithmetic number, because the mean of its divisors is an integer number (216639024).

Almost surely, 2^2805378172 is an apocalyptic number.

It is an amenable number.

2805378172 is a deficient number, since it is larger than the sum of its proper divisors (2393958404).

2805378172 is a wasteful number, since it uses less digits than its factorization.

2805378172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455217 (or 455215 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 2805378172 is about 52965.8207903927. The cubic root of 2805378172 is about 1410.3615879312.

The spelling of 2805378172 in words is "two billion, eight hundred five million, three hundred seventy-eight thousand, one hundred seventy-two".