50491818 has 48 divisors (see below), whose sum is σ = 120347136. Its totient is φ = 15202080.

The previous prime is 50491801. The next prime is 50491829. The reversal of 50491818 is 81819405.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8703 + ... + 13293.

It is an arithmetic number, because the mean of its divisors is an integer number (2507232).

Almost surely, 2^50491818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50491818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60173568).

50491818 is an abundant number, since it is smaller than the sum of its proper divisors (69855318).

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

50491818 is a wasteful number, since it uses less digits than its factorization.

50491818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4659 (or 4656 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 50491818 is about 7105.7594949449. The cubic root of 50491818 is about 369.6071262049.

The spelling of 50491818 in words is "fifty million, four hundred ninety-one thousand, eight hundred eighteen".