28474405 has 8 divisors (see below), whose sum is σ = 36179352. Its totient is φ = 21439488.

The previous prime is 28474387. The next prime is 28474421. The reversal of 28474405 is 50447482.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3932289 + 24542116 = 1983^2 + 4954^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28474405 - 2¹¹ = 28472357 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 167412 + ... + 167581.

It is an arithmetic number, because the mean of its divisors is an integer number (4522419).

Almost surely, 2^28474405 is an apocalyptic number.

It is an amenable number.

28474405 is a deficient number, since it is larger than the sum of its proper divisors (7704947).

28474405 is a wasteful number, since it uses less digits than its factorization.

28474405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335015.

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 28474405 is about 5336.1413961776. The cubic root of 28474405 is about 305.3642695984.

The spelling of 28474405 in words is "twenty-eight million, four hundred seventy-four thousand, four hundred five".