28476409 has 16 divisors (see below), whose sum is σ = 31530240. Its totient is φ = 25557120.

The previous prime is 28476403. The next prime is 28476439. The reversal of 28476409 is 90467482.

28476409 = T₃₁₂ + T₃₁₃ + ... + T₅₈₅.

It is a cyclic number.

It is not a de Polignac number, because 28476409 - 2¹¹ = 28474361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28476403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104944 + ... + 105214.

It is an arithmetic number, because the mean of its divisors is an integer number (1970640).

Almost surely, 2^28476409 is an apocalyptic number.

It is an amenable number.

28476409 is a deficient number, since it is larger than the sum of its proper divisors (3053831).

28476409 is a wasteful number, since it uses less digits than its factorization.

28476409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 28476409 is about 5336.3291690075. The cubic root of 28476409 is about 305.3714331738.

The spelling of 28476409 in words is "twenty-eight million, four hundred seventy-six thousand, four hundred nine".