49787818 has 4 divisors (see below), whose sum is σ = 74681730. Its totient is φ = 24893908.

The previous prime is 49787813. The next prime is 49787819. The reversal of 49787818 is 81878794.

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., 41126569 + 8661249 = 6413^2 + 2943^2 .

It is a super-2 number, since 2×49787818² = 4957653642402248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49787813) 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, 12446953 + ... + 12446956.

Almost surely, 2^49787818 is an apocalyptic number.

49787818 is a deficient number, since it is larger than the sum of its proper divisors (24893912).

49787818 is a wasteful number, since it uses less digits than its factorization.

49787818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24893911.

The product of its digits is 903168, while the sum is 52.

The square root of 49787818 is about 7056.0483274989. The cubic root of 49787818 is about 367.8812875201.

It can be divided in two parts, 49787 and 818, that added together give a palindrome (50605).

The spelling of 49787818 in words is "forty-nine million, seven hundred eighty-seven thousand, eight hundred eighteen".