28487697 has 16 divisors (see below), whose sum is σ = 43502592. Its totient is φ = 16243920.

The previous prime is 28487689. The next prime is 28487717. The reversal of 28487697 is 79678482.

It is not a de Polignac number, because 28487697 - 2³ = 28487689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28487617) 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, 11172 + ... + 13482.

It is an arithmetic number, because the mean of its divisors is an integer number (2718912).

Almost surely, 2^28487697 is an apocalyptic number.

It is an amenable number.

28487697 is a deficient number, since it is larger than the sum of its proper divisors (15014895).

28487697 is a wasteful number, since it uses less digits than its factorization.

28487697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908.

The product of its digits is 1354752, while the sum is 51.

The square root of 28487697 is about 5337.3867201094. The cubic root of 28487697 is about 305.4117774154.

The spelling of 28487697 in words is "twenty-eight million, four hundred eighty-seven thousand, six hundred ninety-seven".