28938106 has 8 divisors (see below), whose sum is σ = 44226324. Its totient is φ = 14196000.

The previous prime is 28938103. The next prime is 28938137. The reversal of 28938106 is 60183982.

It can be written as a sum of positive squares in 2 ways, for example, as 24354225 + 4583881 = 4935^2 + 2141^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28938101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136395 + ... + 136606.

Almost surely, 2^28938106 is an apocalyptic number.

28938106 is a deficient number, since it is larger than the sum of its proper divisors (15288218).

28938106 is a wasteful number, since it uses less digits than its factorization.

28938106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273056.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 28938106 is about 5379.4150239594. The cubic root of 28938106 is about 307.0129544980.

The spelling of 28938106 in words is "twenty-eight million, nine hundred thirty-eight thousand, one hundred six".