49018 has 4 divisors (see below), whose sum is σ = 73530.
Its totient is φ = 24508.
The previous prime is 49009. The next prime is 49019. The reversal of 49018 is 81094.
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., 31329 + 17689 = 177^2 + 133^2
It is a super-3 number, since 3×490183 = 353336104901496, which contains 333 as substring.
It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is an alternating number because its digits alternate between even and odd.
It is a plaindrome in base 12.
It is a self number, because there is not a number n which added to its sum of digits gives 49018.
It is not an unprimeable number, because it can be changed into a prime (49019) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12253 + ... + 12256.
249018 is an apocalyptic number.
49018 is a deficient number, since it is larger than the sum of its proper divisors (24512).
49018 is a wasteful number, since it uses less digits than its factorization.
49018 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 24511.
The product of its (nonzero) digits is 288, while the sum is 22.
The square root of 49018 is about 221.4000903342.
The cubic root of 49018 is about 36.5975373342.
The spelling of 49018 in words is "forty-nine thousand, eighteen".