2826721 has 8 divisors (see below), whose sum is σ = 2914560. Its totient is φ = 2740128.

The previous prime is 2826701. The next prime is 2826727. The reversal of 2826721 is 1276282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2826721 - 2²¹ = 729569 is a prime.

It is a super-2 number, since 2×2826721² = 15980703223682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2826721.

It is not an unprimeable number, because it can be changed into a prime (2826727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6220 + ... + 6658.

It is an arithmetic number, because the mean of its divisors is an integer number (364320).

2^2826721 is an apocalyptic number.

It is an amenable number.

2826721 is a deficient number, since it is larger than the sum of its proper divisors (87839).

2826721 is a wasteful number, since it uses less digits than its factorization.

2826721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623.

The product of its digits is 2688, while the sum is 28.

The square root of 2826721 is about 1681.2855200709. The cubic root of 2826721 is about 141.3929151055.

The spelling of 2826721 in words is "two million, eight hundred twenty-six thousand, seven hundred twenty-one".