2078278418 has 8 divisors (see below), whose sum is σ = 3168523020. Its totient is φ = 1022104080.

The previous prime is 2078278399. The next prime is 2078278421. The reversal of 2078278418 is 8148728702.

It can be written as a sum of positive squares in 2 ways, for example, as 1702965289 + 375313129 = 41267^2 + 19373^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8517413 + ... + 8517656.

Almost surely, 2^2078278418 is an apocalyptic number.

2078278418 is a deficient number, since it is larger than the sum of its proper divisors (1090244602).

2078278418 is a wasteful number, since it uses less digits than its factorization.

2078278418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17035132.

The product of its (nonzero) digits is 401408, while the sum is 47.

The square root of 2078278418 is about 45588.1390056668. The cubic root of 2078278418 is about 1276.1485829309.

The spelling of 2078278418 in words is "two billion, seventy-eight million, two hundred seventy-eight thousand, four hundred eighteen".