28361738 has 4 divisors (see below), whose sum is σ = 42542610. Its totient is φ = 14180868.

The previous prime is 28361717. The next prime is 28361819. The reversal of 28361738 is 83716382.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22344529 + 6017209 = 4727^2 + 2453^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7090433 + ... + 7090436.

Almost surely, 2^28361738 is an apocalyptic number.

28361738 is a deficient number, since it is larger than the sum of its proper divisors (14180872).

28361738 is a wasteful number, since it uses less digits than its factorization.

28361738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14180871.

The product of its digits is 48384, while the sum is 38.

The square root of 28361738 is about 5325.5739596780. The cubic root of 28361738 is about 304.9609839907.

The spelling of 28361738 in words is "twenty-eight million, three hundred sixty-one thousand, seven hundred thirty-eight".