28970667 has 36 divisors (see below), whose sum is σ = 47305440. Its totient is φ = 17059680.

The previous prime is 28970663. The next prime is 28970677. The reversal of 28970667 is 76607982.

It is a happy number.

It is not a de Polignac number, because 28970667 - 2² = 28970663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28970663) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 39934 + ... + 40652.

It is an arithmetic number, because the mean of its divisors is an integer number (1314040).

Almost surely, 2^28970667 is an apocalyptic number.

28970667 is a deficient number, since it is larger than the sum of its proper divisors (18334773).

28970667 is a wasteful number, since it uses less digits than its factorization.

28970667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 28970667 is about 5382.4406174151. The cubic root of 28970667 is about 307.1280611070.

The spelling of 28970667 in words is "twenty-eight million, nine hundred seventy thousand, six hundred sixty-seven".