28020097 has 16 divisors (see below), whose sum is σ = 34739712. Its totient is φ = 22049280.

The previous prime is 28020089. The next prime is 28020107. The reversal of 28020097 is 79002082.

It is a cyclic number.

It is not a de Polignac number, because 28020097 - 2³ = 28020089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28020077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2008 + ... + 7750.

It is an arithmetic number, because the mean of its divisors is an integer number (2171232).

Almost surely, 2^28020097 is an apocalyptic number.

It is an amenable number.

28020097 is a deficient number, since it is larger than the sum of its proper divisors (6719615).

28020097 is a wasteful number, since it uses less digits than its factorization.

28020097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5808.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 28020097 is about 5293.4012695053. The cubic root of 28020097 is about 303.7315302040.

The spelling of 28020097 in words is "twenty-eight million, twenty thousand, ninety-seven".