49491840 has 128 divisors (see below), whose sum is σ = 159732000. Its totient is φ = 13033472.

The previous prime is 49491833. The next prime is 49491847. The reversal of 49491840 is 4819494.

49491840 is nontrivially palindromic in base 11.

49491840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (49491833) and next prime (49491847).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49491847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285994 + ... + 286166.

Almost surely, 2^49491840 is an apocalyptic number.

49491840 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 49491840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79866000).

49491840 is an abundant number, since it is smaller than the sum of its proper divisors (110240160).

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

49491840 is a wasteful number, since it uses less digits than its factorization.

49491840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 49491840 is about 7035.0437098855. The cubic root of 49491840 is about 367.1508461315.

The spelling of 49491840 in words is "forty-nine million, four hundred ninety-one thousand, eight hundred forty".