2678220 has 36 divisors (see below), whose sum is σ = 8124480. Its totient is φ = 714144.

The previous prime is 2678219. The next prime is 2678227. The reversal of 2678220 is 228762.

2678220 = 239² + 240² + ... + 278².

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

It is not an unprimeable number, because it can be changed into a prime (2678227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7260 + ... + 7619.

It is an arithmetic number, because the mean of its divisors is an integer number (225680).

2^2678220 is an apocalyptic number.

2678220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2678220 is an abundant number, since it is smaller than the sum of its proper divisors (5446260).

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

2678220 is a wasteful number, since it uses less digits than its factorization.

2678220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14894 (or 14889 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 2678220 is about 1636.5268100462. The cubic root of 2678220 is about 138.8722321951.

The spelling of 2678220 in words is "two million, six hundred seventy-eight thousand, two hundred twenty".