28922637 has 8 divisors (see below), whose sum is σ = 38653120. Its totient is φ = 19236960.

The previous prime is 28922633. The next prime is 28922639. The reversal of 28922637 is 73622982.

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

It is not a de Polignac number, because 28922637 - 2² = 28922633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28922595 and 28922604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28922633) 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 7 ways as a sum of consecutive naturals, for example, 9664 + ... + 12297.

It is an arithmetic number, because the mean of its divisors is an integer number (4831640).

Almost surely, 2^28922637 is an apocalyptic number.

It is an amenable number.

28922637 is a deficient number, since it is larger than the sum of its proper divisors (9730483).

28922637 is a wasteful number, since it uses less digits than its factorization.

28922637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22403.

The product of its digits is 72576, while the sum is 39.

The square root of 28922637 is about 5377.9770360239. The cubic root of 28922637 is about 306.9582396769.

The spelling of 28922637 in words is "twenty-eight million, nine hundred twenty-two thousand, six hundred thirty-seven".