28665501 has 8 divisors (see below), whose sum is σ = 38559360. Its totient is φ = 18940992.

The previous prime is 28665499. The next prime is 28665503. The reversal of 28665501 is 10556682.

It is an interprime number because it is at equal distance from previous prime (28665499) and next prime (28665503).

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

It is not a de Polignac number, because 28665501 - 2¹ = 28665499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28665503) 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, 41941 + ... + 42618.

It is an arithmetic number, because the mean of its divisors is an integer number (4819920).

Almost surely, 2^28665501 is an apocalyptic number.

It is an amenable number.

28665501 is a deficient number, since it is larger than the sum of its proper divisors (9893859).

28665501 is a wasteful number, since it uses less digits than its factorization.

28665501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84675.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 28665501 is about 5354.0172767745. The cubic root of 28665501 is about 306.0458622362.

The spelling of 28665501 in words is "twenty-eight million, six hundred sixty-five thousand, five hundred one".