28408061 has 4 divisors (see below), whose sum is σ = 30990624. Its totient is φ = 25825500.

The previous prime is 28408057. The next prime is 28408063. The reversal of 28408061 is 16080482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28408061 - 2² = 28408057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28408063) 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, 1291265 + ... + 1291286.

It is an arithmetic number, because the mean of its divisors is an integer number (7747656).

Almost surely, 2^28408061 is an apocalyptic number.

It is an amenable number.

28408061 is a deficient number, since it is larger than the sum of its proper divisors (2582563).

28408061 is a wasteful number, since it uses less digits than its factorization.

28408061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582562.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28408061 is about 5329.9212939780. The cubic root of 28408061 is about 305.1269237933.

It can be divided in two parts, 2840 and 8061, that added together give a palindrome (10901).

The spelling of 28408061 in words is "twenty-eight million, four hundred eight thousand, sixty-one".