28922337 has 6 divisors (see below), whose sum is σ = 41776722. Its totient is φ = 19281552.

The previous prime is 28922329. The next prime is 28922363. The reversal of 28922337 is 73322982.

It can be written as a sum of positive squares in only one way, i.e., 14814801 + 14107536 = 3849^2 + 3756^2 .

It is not a de Polignac number, because 28922337 - 2³ = 28922329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28922737) 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 5 ways as a sum of consecutive naturals, for example, 1606788 + ... + 1606805.

It is an arithmetic number, because the mean of its divisors is an integer number (6962787).

Almost surely, 2^28922337 is an apocalyptic number.

It is an amenable number.

28922337 is a deficient number, since it is larger than the sum of its proper divisors (12854385).

28922337 is a wasteful number, since it uses less digits than its factorization.

28922337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213599 (or 3213596 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 28922337 is about 5377.9491444230. The cubic root of 28922337 is about 306.9571783653.

The spelling of 28922337 in words is "twenty-eight million, nine hundred twenty-two thousand, three hundred thirty-seven".