28360138 has 8 divisors (see below), whose sum is σ = 42564132. Its totient is φ = 14172096.

The previous prime is 28360121. The next prime is 28360159. The reversal of 28360138 is 83106382.

It can be written as a sum of positive squares in 2 ways, for example, as 27699169 + 660969 = 5263^2 + 813^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2706 + ... + 8002.

Almost surely, 2^28360138 is an apocalyptic number.

28360138 is a deficient number, since it is larger than the sum of its proper divisors (14203994).

28360138 is a wasteful number, since it uses less digits than its factorization.

28360138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7976.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28360138 is about 5325.4237390089. The cubic root of 28360138 is about 304.9552491899.

The spelling of 28360138 in words is "twenty-eight million, three hundred sixty thousand, one hundred thirty-eight".