49318440 has 128 divisors (see below), whose sum is σ = 156764160. Its totient is φ = 12387584.

The previous prime is 49318397. The next prime is 49318441. The reversal of 49318440 is 4481394.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (49318441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295237 + ... + 295403.

It is an arithmetic number, because the mean of its divisors is an integer number (1224720).

Almost surely, 2^49318440 is an apocalyptic number.

49318440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49318440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78382080).

49318440 is an abundant number, since it is smaller than the sum of its proper divisors (107445720).

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

49318440 is a wasteful number, since it uses less digits than its factorization.

49318440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 49318440 is about 7022.7088790580. The cubic root of 49318440 is about 366.7215601929.

The spelling of 49318440 in words is "forty-nine million, three hundred eighteen thousand, four hundred forty".