28423637 has 8 divisors (see below), whose sum is σ = 31116960. Its totient is φ = 25748560.

The previous prime is 28423631. The next prime is 28423649. The reversal of 28423637 is 73632482.

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 28423637 - 2⁶ = 28423573 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28423597 and 28423606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28423631) 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, 1187 + ... + 7632.

It is an arithmetic number, because the mean of its divisors is an integer number (3889620).

Almost surely, 2^28423637 is an apocalyptic number.

It is an amenable number.

28423637 is a deficient number, since it is larger than the sum of its proper divisors (2693323).

28423637 is a wasteful number, since it uses less digits than its factorization.

28423637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9123.

The product of its digits is 48384, while the sum is 35.

The square root of 28423637 is about 5331.3822785465. The cubic root of 28423637 is about 305.1826801344.

The spelling of 28423637 in words is "twenty-eight million, four hundred twenty-three thousand, six hundred thirty-seven".