28626841 has 4 divisors (see below), whose sum is σ = 28654884. Its totient is φ = 28598800.

The previous prime is 28626839. The next prime is 28626847. The reversal of 28626841 is 14862682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10265616 + 18361225 = 3204^2 + 4285^2 .

It is a cyclic number.

It is not a de Polignac number, because 28626841 - 2¹ = 28626839 is a prime.

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 28626841.

It is not an unprimeable number, because it can be changed into a prime (28626847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12430 + ... + 14551.

It is an arithmetic number, because the mean of its divisors is an integer number (7163721).

Almost surely, 2^28626841 is an apocalyptic number.

It is an amenable number.

28626841 is a deficient number, since it is larger than the sum of its proper divisors (28043).

28626841 is a wasteful number, since it uses less digits than its factorization.

28626841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28042.

The product of its digits is 36864, while the sum is 37.

The square root of 28626841 is about 5350.4056855532. The cubic root of 28626841 is about 305.9082164529.

The spelling of 28626841 in words is "twenty-eight million, six hundred twenty-six thousand, eight hundred forty-one".