28119958 has 4 divisors (see below), whose sum is σ = 42179940. Its totient is φ = 14059978.

The previous prime is 28119953. The next prime is 28119983. The reversal of 28119958 is 85991182.

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 (28119953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7029988 + ... + 7029991.

It is an arithmetic number, because the mean of its divisors is an integer number (10544985).

Almost surely, 2^28119958 is an apocalyptic number.

28119958 is a deficient number, since it is larger than the sum of its proper divisors (14059982).

28119958 is a wasteful number, since it uses less digits than its factorization.

28119958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14059981.

The product of its digits is 51840, while the sum is 43.

The square root of 28119958 is about 5302.8254732737. The cubic root of 28119958 is about 304.0919259741.

It can be divided in two parts, 2811 and 9958, that added together give a square (12769 = 113²).

The spelling of 28119958 in words is "twenty-eight million, one hundred nineteen thousand, nine hundred fifty-eight".