28887646 has 8 divisors (see below), whose sum is σ = 43736760. Its totient is φ = 14308728.

The previous prime is 28887637. The next prime is 28887647. The reversal of 28887646 is 64678882.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28887646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28887647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67281 + ... + 67708.

It is an arithmetic number, because the mean of its divisors is an integer number (5467095).

Almost surely, 2^28887646 is an apocalyptic number.

28887646 is a deficient number, since it is larger than the sum of its proper divisors (14849114).

28887646 is a wasteful number, since it uses less digits than its factorization.

28887646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135098.

The product of its digits is 1032192, while the sum is 49.

The square root of 28887646 is about 5374.7228765770. The cubic root of 28887646 is about 306.8344023043.

The spelling of 28887646 in words is "twenty-eight million, eight hundred eighty-seven thousand, six hundred forty-six".