28251746 has 16 divisors (see below), whose sum is σ = 44724960. Its totient is φ = 13347360.

The previous prime is 28251733. The next prime is 28251781. The reversal of 28251746 is 64715282.

It is a super-2 number, since 2×28251746² = 1596322304097032, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19085 + ... + 20511.

It is an arithmetic number, because the mean of its divisors is an integer number (2795310).

Almost surely, 2^28251746 is an apocalyptic number.

28251746 is a deficient number, since it is larger than the sum of its proper divisors (16473214).

28251746 is a wasteful number, since it uses less digits than its factorization.

28251746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969.

The product of its digits is 26880, while the sum is 35.

The square root of 28251746 is about 5315.2371536931. The cubic root of 28251746 is about 304.5662417911.

The spelling of 28251746 in words is "twenty-eight million, two hundred fifty-one thousand, seven hundred forty-six".