2178259842 has 16 divisors (see below), whose sum is σ = 4752567072. Its totient is φ = 660078720.

The previous prime is 2178259817. The next prime is 2178259927. The reversal of 2178259842 is 2489528712.

It is a junction number, because it is equal to n+sod(n) for n = 2178259791 and 2178259800.

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, 16501903 + ... + 16502034.

It is an arithmetic number, because the mean of its divisors is an integer number (297035442).

Almost surely, 2^2178259842 is an apocalyptic number.

2178259842 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2178259842 is an abundant number, since it is smaller than the sum of its proper divisors (2574307230).

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

2178259842 is a wasteful number, since it uses less digits than its factorization.

2178259842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33003953.

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

The square root of 2178259842 is about 46671.8313546833. The cubic root of 2178259842 is about 1296.2931566574.

The spelling of 2178259842 in words is "two billion, one hundred seventy-eight million, two hundred fifty-nine thousand, eight hundred forty-two".