28490073 has 4 divisors (see below), whose sum is σ = 37986768. Its totient is φ = 18993380.

The previous prime is 28490071. The next prime is 28490083. The reversal of 28490073 is 37009482.

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 28490073 - 2¹ = 28490071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28490071) 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, 4748343 + ... + 4748348.

It is an arithmetic number, because the mean of its divisors is an integer number (9496692).

Almost surely, 2^28490073 is an apocalyptic number.

It is an amenable number.

28490073 is a deficient number, since it is larger than the sum of its proper divisors (9496695).

28490073 is an equidigital number, since it uses as much as digits as its factorization.

28490073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9496694.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 28490073 is about 5337.6092963049. The cubic root of 28490073 is about 305.4202680773.

The spelling of 28490073 in words is "twenty-eight million, four hundred ninety thousand, seventy-three".