28009151 has 8 divisors (see below), whose sum is σ = 29311104. Its totient is φ = 26732160.

The previous prime is 28009139. The next prime is 28009153. The reversal of 28009151 is 15190082.

It is a happy number.

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 28009151 - 2¹⁸ = 27747007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28009151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28009153) 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, 3926 + ... + 8451.

It is an arithmetic number, because the mean of its divisors is an integer number (3663888).

Almost surely, 2^28009151 is an apocalyptic number.

28009151 is a deficient number, since it is larger than the sum of its proper divisors (1301953).

28009151 is a wasteful number, since it uses less digits than its factorization.

28009151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12481.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 28009151 is about 5292.3672397142. The cubic root of 28009151 is about 303.6919743292.

The spelling of 28009151 in words is "twenty-eight million, nine thousand, one hundred fifty-one".