28671607 has 4 divisors (see below), whose sum is σ = 28682320. Its totient is φ = 28660896.

The previous prime is 28671557. The next prime is 28671611. The reversal of 28671607 is 70617682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28671607 - 2¹¹ = 28669559 is a prime.

It is a super-2 number, since 2×28671607² = 1644122095924898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28671637) 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, 2494 + ... + 7972.

It is an arithmetic number, because the mean of its divisors is an integer number (7170580).

Almost surely, 2^28671607 is an apocalyptic number.

28671607 is a deficient number, since it is larger than the sum of its proper divisors (10713).

28671607 is an equidigital number, since it uses as much as digits as its factorization.

28671607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10712.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 28671607 is about 5354.5874724389. The cubic root of 28671607 is about 306.0675908333.

The spelling of 28671607 in words is "twenty-eight million, six hundred seventy-one thousand, six hundred seven".