5728621 has 2 divisors, whose sum is σ = 5728622. Its totient is φ = 5728620.

The previous prime is 5728579. The next prime is 5728627. The reversal of 5728621 is 1268275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3200521 + 2528100 = 1789^2 + 1590^2 .

It is a cyclic number.

It is not a de Polignac number, because 5728621 - 2¹⁵ = 5695853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5728627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2864310 + 2864311.

It is an arithmetic number, because the mean of its divisors is an integer number (2864311).

Almost surely, 2^5728621 is an apocalyptic number.

It is an amenable number.

5728621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5728621 is an equidigital number, since it uses as much as digits as its factorization.

5728621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 31.

The square root of 5728621 is about 2393.4537806275. The cubic root of 5728621 is about 178.9300830736.

The spelling of 5728621 in words is "five million, seven hundred twenty-eight thousand, six hundred twenty-one".