2728631 has 2 divisors, whose sum is σ = 2728632. Its totient is φ = 2728630.

The previous prime is 2728603. The next prime is 2728643. The reversal of 2728631 is 1368272.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2728631 - 2⁶ = 2728567 is a prime.

It is a super-2 number, since 2×2728631² = 14890854268322, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2² + 7³ + 2²⁰ + 8² + 6⁸ + 3³ + 1 .

It is a junction number, because it is equal to n+sod(n) for n = 2728594 and 2728603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2728331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364315 + 1364316.

It is an arithmetic number, because the mean of its divisors is an integer number (1364316).

2^2728631 is an apocalyptic number.

2728631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2728631 is an equidigital number, since it uses as much as digits as its factorization.

2728631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 2728631 is about 1651.8568339902. The cubic root of 2728631 is about 139.7381329375.

The spelling of 2728631 in words is "two million, seven hundred twenty-eight thousand, six hundred thirty-one".