28946405 has 16 divisors (see below), whose sum is σ = 37747200. Its totient is φ = 21228480.

The previous prime is 28946387. The next prime is 28946417. The reversal of 28946405 is 50464982.

It is not a de Polignac number, because 28946405 - 2¹⁶ = 28880869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1970 + ... + 7859.

It is an arithmetic number, because the mean of its divisors is an integer number (2359200).

Almost surely, 2^28946405 is an apocalyptic number.

It is an amenable number.

28946405 is a deficient number, since it is larger than the sum of its proper divisors (8800795).

28946405 is a wasteful number, since it uses less digits than its factorization.

28946405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9884.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 28946405 is about 5380.1863350631. The cubic root of 28946405 is about 307.0423005441.

The spelling of 28946405 in words is "twenty-eight million, nine hundred forty-six thousand, four hundred five".