28674637 has 4 divisors (see below), whose sum is σ = 28857436. Its totient is φ = 28491840.

The previous prime is 28674617. The next prime is 28674641. The reversal of 28674637 is 73647682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73647682 = 2 ⋅36823841.

It can be written as a sum of positive squares in 2 ways, for example, as 17189316 + 11485321 = 4146^2 + 3389^2 .

It is a cyclic number.

It is not a de Polignac number, because 28674637 - 2⁷ = 28674509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28674593 and 28674602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28674617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91164 + ... + 91477.

It is an arithmetic number, because the mean of its divisors is an integer number (7214359).

Almost surely, 2^28674637 is an apocalyptic number.

It is an amenable number.

28674637 is a deficient number, since it is larger than the sum of its proper divisors (182799).

28674637 is a wasteful number, since it uses less digits than its factorization.

28674637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182798.

The product of its digits is 338688, while the sum is 43.

The square root of 28674637 is about 5354.8703999257. The cubic root of 28674637 is about 306.0783721396.

The spelling of 28674637 in words is "twenty-eight million, six hundred seventy-four thousand, six hundred thirty-seven".