49315840 has 128 divisors (see below), whose sum is σ = 138409920. Its totient is φ = 16515072.

The previous prime is 49315817. The next prime is 49315843. The reversal of 49315840 is 4851394.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 49315796 and 49315805.

It is not an unprimeable number, because it can be changed into a prime (49315843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1146859 + ... + 1146901.

Almost surely, 2^49315840 is an apocalyptic number.

49315840 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 49315840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69204960).

49315840 is an abundant number, since it is smaller than the sum of its proper divisors (89094080).

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

49315840 is an frugal number, since it uses more digits than its factorization.

49315840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 49315840 is about 7022.5237628647. The cubic root of 49315840 is about 366.7151157284.

The spelling of 49315840 in words is "forty-nine million, three hundred fifteen thousand, eight hundred forty".