28427973 has 8 divisors (see below), whose sum is σ = 43318848. Its totient is φ = 16244544.

The previous prime is 28427969. The next prime is 28427989. The reversal of 28427973 is 37972482.

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

It is not a de Polignac number, because 28427973 - 2² = 28427969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28427953) by changing a digit.

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, 676836 + ... + 676877.

It is an arithmetic number, because the mean of its divisors is an integer number (5414856).

Almost surely, 2^28427973 is an apocalyptic number.

It is an amenable number.

28427973 is a deficient number, since it is larger than the sum of its proper divisors (14890875).

28427973 is a wasteful number, since it uses less digits than its factorization.

28427973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353723.

The product of its digits is 169344, while the sum is 42.

The square root of 28427973 is about 5331.7889118006. The cubic root of 28427973 is about 305.1981977922.

The spelling of 28427973 in words is "twenty-eight million, four hundred twenty-seven thousand, nine hundred seventy-three".