28702042 has 4 divisors (see below), whose sum is σ = 43053066. Its totient is φ = 14351020.

The previous prime is 28702033. The next prime is 28702061. The reversal of 28702042 is 24020782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24020782 = 2 ⋅12010391.

It can be written as a sum of positive squares in only one way, i.e., 26739241 + 1962801 = 5171^2 + 1401^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28701998 and 28702016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7175509 + ... + 7175512.

Almost surely, 2^28702042 is an apocalyptic number.

28702042 is a deficient number, since it is larger than the sum of its proper divisors (14351024).

28702042 is a wasteful number, since it uses less digits than its factorization.

28702042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14351023.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 28702042 is about 5357.4286742802. The cubic root of 28702042 is about 306.1758497697.

The spelling of 28702042 in words is "twenty-eight million, seven hundred two thousand, forty-two".