49878018 has 40 divisors (see below), whose sum is σ = 112559040. Its totient is φ = 16507800.

The previous prime is 49878013. The next prime is 49878019. The reversal of 49878018 is 81087894.

It is not an unprimeable number, because it can be changed into a prime (49878013) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23443 + ... + 25481.

It is an arithmetic number, because the mean of its divisors is an integer number (2813976).

Almost surely, 2^49878018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49878018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56279520).

49878018 is an abundant number, since it is smaller than the sum of its proper divisors (62681022).

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

49878018 is a wasteful number, since it uses less digits than its factorization.

49878018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204 (or 2195 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 49878018 is about 7062.4371147643. The cubic root of 49878018 is about 368.1033155489.

The spelling of 49878018 in words is "forty-nine million, eight hundred seventy-eight thousand, eighteen".