28481758 has 8 divisors (see below), whose sum is σ = 43049160. Its totient is φ = 14132040.

The previous prime is 28481737. The next prime is 28481759. The reversal of 28481758 is 85718482.

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

It is a super-2 number, since 2×28481758² = 1622421077541128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28481759) 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, 54093 + ... + 54616.

It is an arithmetic number, because the mean of its divisors is an integer number (5381145).

Almost surely, 2^28481758 is an apocalyptic number.

28481758 is a deficient number, since it is larger than the sum of its proper divisors (14567402).

28481758 is a wasteful number, since it uses less digits than its factorization.

28481758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108842.

The product of its digits is 143360, while the sum is 43.

The square root of 28481758 is about 5336.8303326975. The cubic root of 28481758 is about 305.3905522691.

The spelling of 28481758 in words is "twenty-eight million, four hundred eighty-one thousand, seven hundred fifty-eight".