28623637 has 8 divisors (see below), whose sum is σ = 32883776. Its totient is φ = 24406272.

The previous prime is 28623601. The next prime is 28623643. The reversal of 28623637 is 73632682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28623637 - 2¹¹ = 28621589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28623596 and 28623605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28623697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9243 + ... + 11944.

It is an arithmetic number, because the mean of its divisors is an integer number (4110472).

Almost surely, 2^28623637 is an apocalyptic number.

It is an amenable number.

28623637 is a deficient number, since it is larger than the sum of its proper divisors (4260139).

28623637 is a wasteful number, since it uses less digits than its factorization.

28623637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21387.

The product of its digits is 72576, while the sum is 37.

The square root of 28623637 is about 5350.1062606270. The cubic root of 28623637 is about 305.8968033121.

The spelling of 28623637 in words is "twenty-eight million, six hundred twenty-three thousand, six hundred thirty-seven".