8720220278 has 64 divisors (see below), whose sum is σ = 18176140800. Its totient is φ = 3029322240.

The previous prime is 8720220269. The next prime is 8720220287.

8720220278 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (8720220269) and next prime (8720220287).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37913 + ... + 137396.

It is an arithmetic number, because the mean of its divisors is an integer number (284002200).

Almost surely, 2^8720220278 is an apocalyptic number.

8720220278 is an abundant number, since it is smaller than the sum of its proper divisors (9455920522).

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

8720220278 is a wasteful number, since it uses less digits than its factorization.

8720220278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175365.

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 8720220278 is about 93382.1196910843. The cubic root of 8720220278 is about 2058.3022646060.

The spelling of 8720220278 in words is "eight billion, seven hundred twenty million, two hundred twenty thousand, two hundred seventy-eight".