28331042 has 4 divisors (see below), whose sum is σ = 42496566. Its totient is φ = 14165520.

The previous prime is 28331029. The next prime is 28331047. The reversal of 28331042 is 24013382.

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., 17631601 + 10699441 = 4199^2 + 3271^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28330999 and 28331017.

It is not an unprimeable number, because it can be changed into a prime (28331047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7082759 + ... + 7082762.

Almost surely, 2^28331042 is an apocalyptic number.

28331042 is a deficient number, since it is larger than the sum of its proper divisors (14165524).

28331042 is a wasteful number, since it uses less digits than its factorization.

28331042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14165523.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 28331042 is about 5322.6912365832. The cubic root of 28331042 is about 304.8509241914.

The spelling of 28331042 in words is "twenty-eight million, three hundred thirty-one thousand, forty-two".