28670573 has 4 divisors (see below), whose sum is σ = 29098560. Its totient is φ = 28242588.

The previous prime is 28670561. The next prime is 28670591. The reversal of 28670573 is 37507682.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-28670573 is a prime.

It is a super-2 number, since 2×28670573² = 1644003512296658, which contains 22 as substring.

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 (28670503) 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, 213893 + ... + 214026.

It is an arithmetic number, because the mean of its divisors is an integer number (7274640).

Almost surely, 2^28670573 is an apocalyptic number.

It is an amenable number.

28670573 is a deficient number, since it is larger than the sum of its proper divisors (427987).

28670573 is an equidigital number, since it uses as much as digits as its factorization.

28670573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427986.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 28670573 is about 5354.4909188456. The cubic root of 28670573 is about 306.0639114942.

The spelling of 28670573 in words is "twenty-eight million, six hundred seventy thousand, five hundred seventy-three".