49320018 has 48 divisors (see below), whose sum is σ = 117202176. Its totient is φ = 14865120.

The previous prime is 49320013. The next prime is 49320091. The reversal of 49320018 is 81002394.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 49319973 and 49320000.

It is not an unprimeable number, because it can be changed into a prime (49320013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43596 + ... + 44712.

It is an arithmetic number, because the mean of its divisors is an integer number (2441712).

Almost surely, 2^49320018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49320018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58601088).

49320018 is an abundant number, since it is smaller than the sum of its proper divisors (67882158).

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

49320018 is a wasteful number, since it uses less digits than its factorization.

49320018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359 (or 1356 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 49320018 is about 7022.8212279681. The cubic root of 49320018 is about 366.7254713767.

The spelling of 49320018 in words is "forty-nine million, three hundred twenty thousand, eighteen".