28670427 has 12 divisors (see below), whose sum is σ = 42092544. Its totient is φ = 18799920.

The previous prime is 28670413. The next prime is 28670429. The reversal of 28670427 is 72407682.

It is not a de Polignac number, because 28670427 - 2⁶ = 28670363 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28670391 and 28670400.

It is not an unprimeable number, because it can be changed into a prime (28670429) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 25563 + ... + 26660.

It is an arithmetic number, because the mean of its divisors is an integer number (3507712).

Almost surely, 2^28670427 is an apocalyptic number.

28670427 is a deficient number, since it is larger than the sum of its proper divisors (13422117).

28670427 is a wasteful number, since it uses less digits than its factorization.

28670427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52290 (or 52287 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 28670427 is about 5354.4772854126. The cubic root of 28670427 is about 306.0633919672.

The spelling of 28670427 in words is "twenty-eight million, six hundred seventy thousand, four hundred twenty-seven".