2178005730 has 16 divisors (see below), whose sum is σ = 5227213824. Its totient is φ = 580801520.

The previous prime is 2178005693. The next prime is 2178005741. The reversal of 2178005730 is 375008712.

It is a junction number, because it is equal to n+sod(n) for n = 2178005691 and 2178005700.

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, 36300066 + ... + 36300125.

It is an arithmetic number, because the mean of its divisors is an integer number (326700864).

Almost surely, 2^2178005730 is an apocalyptic number.

2178005730 is an abundant number, since it is smaller than the sum of its proper divisors (3049208094).

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

2178005730 is a wasteful number, since it uses less digits than its factorization.

2178005730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72600201.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 2178005730 is about 46669.1089479969. The cubic root of 2178005730 is about 1296.2427469297.

The spelling of 2178005730 in words is "two billion, one hundred seventy-eight million, five thousand, seven hundred thirty".