28646445 has 16 divisors (see below), whose sum is σ = 48530880. Its totient is φ = 14379264.

The previous prime is 28646419. The next prime is 28646467. The reversal of 28646445 is 54464682.

It is not a de Polignac number, because 28646445 - 2⁶ = 28646381 is a prime.

It is a super-2 number, since 2×28646445² = 1641237622276050, which contains 22 as substring.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 55915 + ... + 56424.

It is an arithmetic number, because the mean of its divisors is an integer number (3033180).

Almost surely, 2^28646445 is an apocalyptic number.

It is an amenable number.

28646445 is a deficient number, since it is larger than the sum of its proper divisors (19884435).

28646445 is a wasteful number, since it uses less digits than its factorization.

28646445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112364.

The product of its digits is 184320, while the sum is 39.

The square root of 28646445 is about 5352.2373826279. The cubic root of 28646445 is about 305.9780303762.

The spelling of 28646445 in words is "twenty-eight million, six hundred forty-six thousand, four hundred forty-five".