28690159 has 8 divisors (see below), whose sum is σ = 30305792. Its totient is φ = 27117720.

The previous prime is 28690153. The next prime is 28690199. The reversal of 28690159 is 95109682.

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 28690159 - 2¹¹ = 28688111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28690153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9429 + ... + 12094.

It is an arithmetic number, because the mean of its divisors is an integer number (3788224).

Almost surely, 2^28690159 is an apocalyptic number.

28690159 is a deficient number, since it is larger than the sum of its proper divisors (1615633).

28690159 is a wasteful number, since it uses less digits than its factorization.

28690159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21597.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 28690159 is about 5356.3195386384. The cubic root of 28690159 is about 306.1335904090.

It can be divided in two parts, 28690 and 159, that multiplied together give a triangular number (4561710 = T₃₀₂₀).

The spelling of 28690159 in words is "twenty-eight million, six hundred ninety thousand, one hundred fifty-nine".