28711946 has 8 divisors (see below), whose sum is σ = 45601380. Its totient is φ = 13511488.

The previous prime is 28711909. The next prime is 28711957. The reversal of 28711946 is 64911782.

It can be written as a sum of positive squares in 2 ways, for example, as 28504921 + 207025 = 5339^2 + 455^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 422201 + ... + 422268.

Almost surely, 2^28711946 is an apocalyptic number.

28711946 is a deficient number, since it is larger than the sum of its proper divisors (16889434).

28711946 is a wasteful number, since it uses less digits than its factorization.

28711946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844488.

The product of its digits is 24192, while the sum is 38.

The square root of 28711946 is about 5358.3529185749. The cubic root of 28711946 is about 306.2110623271.

The spelling of 28711946 in words is "twenty-eight million, seven hundred eleven thousand, nine hundred forty-six".