49081918 has 4 divisors (see below), whose sum is σ = 73622880. Its totient is φ = 24540958.

The previous prime is 49081913. The next prime is 49081927. The reversal of 49081918 is 81918094.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49081913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12270478 + ... + 12270481.

It is an arithmetic number, because the mean of its divisors is an integer number (18405720).

Almost surely, 2^49081918 is an apocalyptic number.

49081918 is a deficient number, since it is larger than the sum of its proper divisors (24540962).

49081918 is a wasteful number, since it uses less digits than its factorization.

49081918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24540961.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 49081918 is about 7005.8488422175. The cubic root of 49081918 is about 366.1343778816.

The spelling of 49081918 in words is "forty-nine million, eighty-one thousand, nine hundred eighteen".