28007667 has 16 divisors (see below), whose sum is σ = 41717760. Its totient is φ = 18570600.

The previous prime is 28007647. The next prime is 28007671. The reversal of 28007667 is 76670082.

It is not a de Polignac number, because 28007667 - 2²⁰ = 26959091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28007647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2442 + ... + 7872.

It is an arithmetic number, because the mean of its divisors is an integer number (2607360).

Almost surely, 2^28007667 is an apocalyptic number.

28007667 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28007667 is a deficient number, since it is larger than the sum of its proper divisors (13710093).

28007667 is a wasteful number, since it uses less digits than its factorization.

28007667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5631 (or 5625 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 28007667 is about 5292.2270359462. The cubic root of 28007667 is about 303.6866107625.

The spelling of 28007667 in words is "twenty-eight million, seven thousand, six hundred sixty-seven".