28034665 has 8 divisors (see below), whose sum is σ = 33717960. Its totient is φ = 22376832.

The previous prime is 28034663. The next prime is 28034681. The reversal of 28034665 is 56643082.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14462809 + 13571856 = 3803^2 + 3684^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28034665 - 2¹ = 28034663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28034665.

It is not an unprimeable number, because it can be changed into a prime (28034663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3850 + ... + 8419.

It is an arithmetic number, because the mean of its divisors is an integer number (4214745).

Almost surely, 2^28034665 is an apocalyptic number.

It is an amenable number.

28034665 is a deficient number, since it is larger than the sum of its proper divisors (5683295).

28034665 is a wasteful number, since it uses less digits than its factorization.

28034665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12731.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 28034665 is about 5294.7771435633. Note that the first 3 decimals coincide. The cubic root of 28034665 is about 303.7841590288.

The spelling of 28034665 in words is "twenty-eight million, thirty-four thousand, six hundred sixty-five".