2678221404 has 18 divisors (see below), whose sum is σ = 6769948640. Its totient is φ = 892740456.

The previous prime is 2678221349. The next prime is 2678221411. The reversal of 2678221404 is 4041228762.

2678221404 is a `hidden beast` number, since 26 + 7 + 8 + 221 + 404 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 74395039 = 2678221404 / (2 + 6 + 7 + 8 + 2 + 2 + 1 + 4 + 0 + 4).

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 37197484 + ... + 37197555.

Almost surely, 2^2678221404 is an apocalyptic number.

It is an amenable number.

2678221404 is an abundant number, since it is smaller than the sum of its proper divisors (4091727236).

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

2678221404 is a wasteful number, since it uses less digits than its factorization.

2678221404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74395049 (or 74395044 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 2678221404 is about 51751.5352815740. The cubic root of 2678221404 is about 1388.7225646200.

The spelling of 2678221404 in words is "two billion, six hundred seventy-eight million, two hundred twenty-one thousand, four hundred four".