28881782 has 8 divisors (see below), whose sum is σ = 44244576. Its totient is φ = 14133592.

The previous prime is 28881773. The next prime is 28881791. The reversal of 28881782 is 28718882.

It is an interprime number because it is at equal distance from previous prime (28881773) and next prime (28881791).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153533 + ... + 153720.

It is an arithmetic number, because the mean of its divisors is an integer number (5530572).

Almost surely, 2^28881782 is an apocalyptic number.

28881782 is a deficient number, since it is larger than the sum of its proper divisors (15362794).

28881782 is a wasteful number, since it uses less digits than its factorization.

28881782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307302.

The product of its digits is 114688, while the sum is 44.

The square root of 28881782 is about 5374.1773323924. The cubic root of 28881782 is about 306.8136391183.

The spelling of 28881782 in words is "twenty-eight million, eight hundred eighty-one thousand, seven hundred eighty-two".