28738946 has 4 divisors (see below), whose sum is σ = 43108422. Its totient is φ = 14369472.

The previous prime is 28738939. The next prime is 28738961. The reversal of 28738946 is 64983782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64983782 = 2 ⋅32491891.

It can be written as a sum of positive squares in only one way, i.e., 23145721 + 5593225 = 4811^2 + 2365^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28738946.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7184735 + ... + 7184738.

Almost surely, 2^28738946 is an apocalyptic number.

28738946 is a deficient number, since it is larger than the sum of its proper divisors (14369476).

28738946 is a wasteful number, since it uses less digits than its factorization.

28738946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14369475.

The product of its digits is 580608, while the sum is 47.

The square root of 28738946 is about 5360.8717574663. The cubic root of 28738946 is about 306.3070166783.

The spelling of 28738946 in words is "twenty-eight million, seven hundred thirty-eight thousand, nine hundred forty-six".