28666467 has 14 divisors (see below), whose sum is σ = 42981132. Its totient is φ = 19110492.

The previous prime is 28666433. The next prime is 28666489. The reversal of 28666467 is 76466682.

It is not a de Polignac number, because 28666467 - 2¹⁰ = 28665443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28646467) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 18933 + ... + 20390.

Almost surely, 2^28666467 is an apocalyptic number.

28666467 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28666467 is a deficient number, since it is larger than the sum of its proper divisors (14314665).

28666467 is an frugal number, since it uses more digits than its factorization.

28666467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39341 (or 39326 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 28666467 is about 5354.1074886483. The cubic root of 28666467 is about 306.0493000153.

The spelling of 28666467 in words is "twenty-eight million, six hundred sixty-six thousand, four hundred sixty-seven".