2978690018 has 8 divisors (see below), whose sum is σ = 4468627548. Its totient is φ = 1489147504.

The previous prime is 2978690009. The next prime is 2978690093. The reversal of 2978690018 is 8100968792.

2978690018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2409533569 + 569156449 = 49087^2 + 23857^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79121 + ... + 110532.

Almost surely, 2^2978690018 is an apocalyptic number.

2978690018 is a deficient number, since it is larger than the sum of its proper divisors (1489937530).

2978690018 is a wasteful number, since it uses less digits than its factorization.

2978690018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197508.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 2978690018 is about 54577.3764301656. The cubic root of 2978690018 is about 1438.8265288752.

The spelling of 2978690018 in words is "two billion, nine hundred seventy-eight million, six hundred ninety thousand, eighteen".