28607966 has 4 divisors (see below), whose sum is σ = 42911952. Its totient is φ = 14303982.

The previous prime is 28607933. The next prime is 28607983. The reversal of 28607966 is 66970682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66970682 = 2 ⋅33485341.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7151990 + ... + 7151993.

It is an arithmetic number, because the mean of its divisors is an integer number (10727988).

Almost surely, 2^28607966 is an apocalyptic number.

28607966 is a deficient number, since it is larger than the sum of its proper divisors (14303986).

28607966 is a wasteful number, since it uses less digits than its factorization.

28607966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14303985.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 28607966 is about 5348.6415097668. The cubic root of 28607966 is about 305.8409685266.

The spelling of 28607966 in words is "twenty-eight million, six hundred seven thousand, nine hundred sixty-six".