28377667 has 4 divisors (see below), whose sum is σ = 28658736. Its totient is φ = 28096600.

The previous prime is 28377637. The next prime is 28377673. The reversal of 28377667 is 76677382.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28377667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28377637) 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, 140383 + ... + 140584.

It is an arithmetic number, because the mean of its divisors is an integer number (7164684).

Almost surely, 2^28377667 is an apocalyptic number.

28377667 is a deficient number, since it is larger than the sum of its proper divisors (281069).

28377667 is a wasteful number, since it uses less digits than its factorization.

28377667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281068.

The product of its digits is 592704, while the sum is 46.

The square root of 28377667 is about 5327.0692693075. The cubic root of 28377667 is about 305.0180657578.

The spelling of 28377667 in words is "twenty-eight million, three hundred seventy-seven thousand, six hundred sixty-seven".