28494922 has 4 divisors (see below), whose sum is σ = 42742386. Its totient is φ = 14247460.

The previous prime is 28494913. The next prime is 28494923. The reversal of 28494922 is 22949482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22949482 = 2 ⋅11474741.

It can be written as a sum of positive squares in only one way, i.e., 26615281 + 1879641 = 5159^2 + 1371^2 .

It is not an unprimeable number, because it can be changed into a prime (28494923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7123729 + ... + 7123732.

Almost surely, 2^28494922 is an apocalyptic number.

28494922 is a deficient number, since it is larger than the sum of its proper divisors (14247464).

28494922 is a wasteful number, since it uses less digits than its factorization.

28494922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14247463.

The product of its digits is 82944, while the sum is 40.

The square root of 28494922 is about 5338.0635065537. The cubic root of 28494922 is about 305.4375945669.

The spelling of 28494922 in words is "twenty-eight million, four hundred ninety-four thousand, nine hundred twenty-two".