28942918 has 4 divisors (see below), whose sum is σ = 43414380. Its totient is φ = 14471458.

The previous prime is 28942883. The next prime is 28942931. The reversal of 28942918 is 81924982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81924982 = 2 ⋅40962491.

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, 7235728 + ... + 7235731.

It is an arithmetic number, because the mean of its divisors is an integer number (10853595).

Almost surely, 2^28942918 is an apocalyptic number.

28942918 is a deficient number, since it is larger than the sum of its proper divisors (14471462).

28942918 is a wasteful number, since it uses less digits than its factorization.

28942918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14471461.

The product of its digits is 82944, while the sum is 43.

The square root of 28942918 is about 5379.8622658949. The cubic root of 28942918 is about 307.0299708668.

The spelling of 28942918 in words is "twenty-eight million, nine hundred forty-two thousand, nine hundred eighteen".