28456667 has 8 divisors (see below), whose sum is σ = 30001152. Its totient is φ = 26951400.

The previous prime is 28456651. The next prime is 28456717. The reversal of 28456667 is 76665482.

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

It is not a de Polignac number, because 28456667 - 2⁴ = 28456651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28456567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8309 + ... + 11222.

It is an arithmetic number, because the mean of its divisors is an integer number (3750144).

Almost surely, 2^28456667 is an apocalyptic number.

28456667 is a deficient number, since it is larger than the sum of its proper divisors (1544485).

28456667 is a wasteful number, since it uses less digits than its factorization.

28456667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19609.

The product of its digits is 483840, while the sum is 44.

The square root of 28456667 is about 5334.4790748488. The cubic root of 28456667 is about 305.3008480034.

The spelling of 28456667 in words is "twenty-eight million, four hundred fifty-six thousand, six hundred sixty-seven".