28901667 has 4 divisors (see below), whose sum is σ = 38535560. Its totient is φ = 19267776.

The previous prime is 28901651. The next prime is 28901669. The reversal of 28901667 is 76610982.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28901667 - 2⁴ = 28901651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28901669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4816942 + ... + 4816947.

It is an arithmetic number, because the mean of its divisors is an integer number (9633890).

Almost surely, 2^28901667 is an apocalyptic number.

28901667 is a deficient number, since it is larger than the sum of its proper divisors (9633893).

28901667 is an equidigital number, since it uses as much as digits as its factorization.

28901667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9633892.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 28901667 is about 5376.0270646640. The cubic root of 28901667 is about 306.8840363164.

The spelling of 28901667 in words is "twenty-eight million, nine hundred one thousand, six hundred sixty-seven".