28030897 has 4 divisors (see below), whose sum is σ = 28292976. Its totient is φ = 27768820.

The previous prime is 28030889. The next prime is 28030957. The reversal of 28030897 is 79803082.

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: 79803082 = 2 ⋅39901541.

It is a cyclic number.

It is not a de Polignac number, because 28030897 - 2³ = 28030889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28030837) 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, 130879 + ... + 131092.

It is an arithmetic number, because the mean of its divisors is an integer number (7073244).

Almost surely, 2^28030897 is an apocalyptic number.

It is an amenable number.

28030897 is a deficient number, since it is larger than the sum of its proper divisors (262079).

28030897 is a wasteful number, since it uses less digits than its factorization.

28030897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262078.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 28030897 is about 5294.4213092651. The cubic root of 28030897 is about 303.7705483793.

The spelling of 28030897 in words is "twenty-eight million, thirty thousand, eight hundred ninety-seven".