2978477218 has 4 divisors (see below), whose sum is σ = 4467715830. Its totient is φ = 1489238608.

The previous prime is 2978477213. The next prime is 2978477239. The reversal of 2978477218 is 8127748792.

2978477218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2445005809 + 533471409 = 49447^2 + 23097^2 .

It is not an unprimeable number, because it can be changed into a prime (2978477213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 744619303 + ... + 744619306.

Almost surely, 2^2978477218 is an apocalyptic number.

2978477218 is a deficient number, since it is larger than the sum of its proper divisors (1489238612).

2978477218 is a wasteful number, since it uses less digits than its factorization.

2978477218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489238611.

The product of its digits is 3161088, while the sum is 55.

The square root of 2978477218 is about 54575.4268696086. The cubic root of 2978477218 is about 1438.7922644195.

The spelling of 2978477218 in words is "two billion, nine hundred seventy-eight million, four hundred seventy-seven thousand, two hundred eighteen".