28697355 has 16 divisors (see below), whose sum is σ = 51017760. Its totient is φ = 15305184.

The previous prime is 28697341. The next prime is 28697359. The reversal of 28697355 is 55379682.

It is a happy number.

It is not a de Polignac number, because 28697355 - 2¹⁰ = 28696331 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28697355.

It is not an unprimeable number, because it can be changed into a prime (28697359) 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, 106152 + ... + 106421.

It is an arithmetic number, because the mean of its divisors is an integer number (3188610).

Almost surely, 2^28697355 is an apocalyptic number.

28697355 is a deficient number, since it is larger than the sum of its proper divisors (22320405).

28697355 is a wasteful number, since it uses less digits than its factorization.

28697355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212587 (or 212581 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 28697355 is about 5356.9912264255. The cubic root of 28697355 is about 306.1591828449.

The spelling of 28697355 in words is "twenty-eight million, six hundred ninety-seven thousand, three hundred fifty-five".