28026687 has 8 divisors (see below), whose sum is σ = 40243504. Its totient is φ = 17247168.

The previous prime is 28026683. The next prime is 28026701. The reversal of 28026687 is 78662082.

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

It is not a de Polignac number, because 28026687 - 2² = 28026683 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 718633 = 28026687 / (2 + 8 + 0 + 2 + 6 + 6 + 8 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28026683) 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, 359278 + ... + 359355.

It is an arithmetic number, because the mean of its divisors is an integer number (5030438).

Almost surely, 2^28026687 is an apocalyptic number.

28026687 is a deficient number, since it is larger than the sum of its proper divisors (12216817).

28026687 is a wasteful number, since it uses less digits than its factorization.

28026687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718649.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 28026687 is about 5294.0237060293. The cubic root of 28026687 is about 303.7553397087.

The spelling of 28026687 in words is "twenty-eight million, twenty-six thousand, six hundred eighty-seven".