2779682220 has 72 divisors (see below), whose sum is σ = 9636236064. Its totient is φ = 635355648.

The previous prime is 2779682209. The next prime is 2779682231. The reversal of 2779682220 is 222869772.

It is an interprime number because it is at equal distance from previous prime (2779682209) and next prime (2779682231).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1101789 + ... + 1104308.

It is an arithmetic number, because the mean of its divisors is an integer number (133836612).

Almost surely, 2^2779682220 is an apocalyptic number.

2779682220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2779682220 is an abundant number, since it is smaller than the sum of its proper divisors (6856553844).

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

2779682220 is a wasteful number, since it uses less digits than its factorization.

2779682220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206119 (or 2206114 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 2779682220 is about 52722.6916991157. The cubic root of 2779682220 is about 1406.0422892030.

The spelling of 2779682220 in words is "two billion, seven hundred seventy-nine million, six hundred eighty-two thousand, two hundred twenty".