28481158 has 4 divisors (see below), whose sum is σ = 42721740. Its totient is φ = 14240578.

The previous prime is 28481149. The next prime is 28481191. The reversal of 28481158 is 85118482.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×28481158² = 1622352722041928, which contains 22 as substring.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7120288 + ... + 7120291.

It is an arithmetic number, because the mean of its divisors is an integer number (10680435).

Almost surely, 2^28481158 is an apocalyptic number.

28481158 is a deficient number, since it is larger than the sum of its proper divisors (14240582).

28481158 is a wasteful number, since it uses less digits than its factorization.

28481158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14240581.

The product of its digits is 20480, while the sum is 37.

The square root of 28481158 is about 5336.7741192597. The cubic root of 28481158 is about 305.3884077898.

The spelling of 28481158 in words is "twenty-eight million, four hundred eighty-one thousand, one hundred fifty-eight".