49999818 has 32 divisors (see below), whose sum is σ = 109942272. Its totient is φ = 15033200.

The previous prime is 49999801. The next prime is 49999819. The reversal of 49999818 is 81899994.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (49999819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5755 + ... + 11537.

It is an arithmetic number, because the mean of its divisors is an integer number (3435696).

Almost surely, 2^49999818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49999818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54971136).

49999818 is an abundant number, since it is smaller than the sum of its proper divisors (59942454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49999818 is a wasteful number, since it uses less digits than its factorization.

49999818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5930.

The product of its digits is 1679616, while the sum is 57.

The square root of 49999818 is about 7071.0549425103. The cubic root of 49999818 is about 368.4027028677.

The spelling of 49999818 in words is "forty-nine million, nine hundred ninety-nine thousand, eight hundred eighteen".