28229042 has 4 divisors (see below), whose sum is σ = 42343566. Its totient is φ = 14114520.

The previous prime is 28229011. The next prime is 28229051. The reversal of 28229042 is 24092282.

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

It can be written as a sum of positive squares in only one way, i.e., 27867841 + 361201 = 5279^2 + 601^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28228996 and 28229014.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7057259 + ... + 7057262.

Almost surely, 2^28229042 is an apocalyptic number.

28229042 is a deficient number, since it is larger than the sum of its proper divisors (14114524).

28229042 is a wasteful number, since it uses less digits than its factorization.

28229042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14114523.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28229042 is about 5313.1009777718. The cubic root of 28229042 is about 304.4846335592.

The spelling of 28229042 in words is "twenty-eight million, two hundred twenty-nine thousand, forty-two".