2978843220 has 36 divisors (see below), whose sum is σ = 9035824980. Its totient is φ = 794358144.

The previous prime is 2978843149. The next prime is 2978843243. The reversal of 2978843220 is 223488792.

It can be written as a sum of positive squares in 2 ways, for example, as 2081001924 + 897841296 = 45618^2 + 29964^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8274385 + ... + 8274744.

Almost surely, 2^2978843220 is an apocalyptic number.

2978843220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2978843220 is an abundant number, since it is smaller than the sum of its proper divisors (6056981760).

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

2978843220 is a wasteful number, since it uses less digits than its factorization.

2978843220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16549144 (or 16549139 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 2978843220 is about 54578.7799423915. The cubic root of 2978843220 is about 1438.8511960188.

The spelling of 2978843220 in words is "two billion, nine hundred seventy-eight million, eight hundred forty-three thousand, two hundred twenty".