49394019840 has 480 divisors, whose sum is σ = 181191403008. Its totient is φ = 11448729600.

The previous prime is 49394019767. The next prime is 49394019853. The reversal of 49394019840 is 4891049394.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (480).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 21372285 + ... + 21374595.

Almost surely, 2^49394019840 is an apocalyptic number.

49394019840 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 49394019840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90595701504).

49394019840 is an abundant number, since it is smaller than the sum of its proper divisors (131797383168).

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

49394019840 is a wasteful number, since it uses less digits than its factorization.

49394019840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382 (or 2355 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The spelling of 49394019840 in words is "forty-nine billion, three hundred ninety-four million, nineteen thousand, eight hundred forty".