28242722 has 4 divisors (see below), whose sum is σ = 42364086. Its totient is φ = 14121360.

The previous prime is 28242719. The next prime is 28242743. The reversal of 28242722 is 22724282.

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., 22762441 + 5480281 = 4771^2 + 2341^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7060679 + ... + 7060682.

Almost surely, 2^28242722 is an apocalyptic number.

28242722 is a deficient number, since it is larger than the sum of its proper divisors (14121364).

28242722 is a wasteful number, since it uses less digits than its factorization.

28242722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14121363.

The product of its digits is 7168, while the sum is 29.

The square root of 28242722 is about 5314.3882056169. The cubic root of 28242722 is about 304.5338107755.

The spelling of 28242722 in words is "twenty-eight million, two hundred forty-two thousand, seven hundred twenty-two".