28054661 has 4 divisors (see below), whose sum is σ = 28094400. Its totient is φ = 28014924.

The previous prime is 28054633. The next prime is 28054679. The reversal of 28054661 is 16645082.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16645082 = 2 ⋅8322541.

It is a cyclic number.

It is not a de Polignac number, because 28054661 - 2¹⁴ = 28038277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28054261) 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, 18791 + ... + 20228.

It is an arithmetic number, because the mean of its divisors is an integer number (7023600).

Almost surely, 2^28054661 is an apocalyptic number.

It is an amenable number.

28054661 is a deficient number, since it is larger than the sum of its proper divisors (39739).

28054661 is an equidigital number, since it uses as much as digits as its factorization.

28054661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39738.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 28054661 is about 5296.6650828611. The cubic root of 28054661 is about 303.8563675415.

The spelling of 28054661 in words is "twenty-eight million, fifty-four thousand, six hundred sixty-one".