28877158 has 4 divisors (see below), whose sum is σ = 43315740. Its totient is φ = 14438578.

The previous prime is 28877153. The next prime is 28877159. The reversal of 28877158 is 85177882.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28877153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7219288 + ... + 7219291.

It is an arithmetic number, because the mean of its divisors is an integer number (10828935).

Almost surely, 2^28877158 is an apocalyptic number.

28877158 is a deficient number, since it is larger than the sum of its proper divisors (14438582).

28877158 is a wasteful number, since it uses less digits than its factorization.

28877158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14438581.

The product of its digits is 250880, while the sum is 46.

The square root of 28877158 is about 5373.7471097922. The cubic root of 28877158 is about 306.7972645287.

The spelling of 28877158 in words is "twenty-eight million, eight hundred seventy-seven thousand, one hundred fifty-eight".