28229937 has 8 divisors (see below), whose sum is σ = 37688640. Its totient is φ = 18795600.

The previous prime is 28229923. The next prime is 28229969. The reversal of 28229937 is 73992282.

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

It is not a de Polignac number, because 28229937 - 2⁸ = 28229681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28229237) 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, 3189 + ... + 8162.

It is an arithmetic number, because the mean of its divisors is an integer number (4711080).

Almost surely, 2^28229937 is an apocalyptic number.

It is an amenable number.

28229937 is a deficient number, since it is larger than the sum of its proper divisors (9458703).

28229937 is a wasteful number, since it uses less digits than its factorization.

28229937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12183.

The product of its digits is 108864, while the sum is 42.

The square root of 28229937 is about 5313.1852028703. The cubic root of 28229937 is about 304.4878514139.

The spelling of 28229937 in words is "twenty-eight million, two hundred twenty-nine thousand, nine hundred thirty-seven".