28887943 has 8 divisors (see below), whose sum is σ = 33318560. Its totient is φ = 24533280.

The previous prime is 28887941. The next prime is 28887979. The reversal of 28887943 is 34978882.

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 28887943 - 2¹ = 28887941 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 (28887941) 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, 18168 + ... + 19693.

It is an arithmetic number, because the mean of its divisors is an integer number (4164820).

Almost surely, 2^28887943 is an apocalyptic number.

28887943 is a deficient number, since it is larger than the sum of its proper divisors (4430617).

28887943 is a wasteful number, since it uses less digits than its factorization.

28887943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37977.

The product of its digits is 774144, while the sum is 49.

The square root of 28887943 is about 5374.7505058375. The cubic root of 28887943 is about 306.8354538438.

The spelling of 28887943 in words is "twenty-eight million, eight hundred eighty-seven thousand, nine hundred forty-three".