49821440 has 36 divisors (see below), whose sum is σ = 119340984. Its totient is φ = 19928064.

The previous prime is 49821419. The next prime is 49821451. The reversal of 49821440 is 4412894.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 49821397 and 49821406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18182 + ... + 20741.

Almost surely, 2^49821440 is an apocalyptic number.

49821440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49821440 is an abundant number, since it is smaller than the sum of its proper divisors (69519544).

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

49821440 is an equidigital number, since it uses as much as digits as its factorization.

49821440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38944 (or 38930 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 49821440 is about 7058.4304204263. The cubic root of 49821440 is about 367.9640796697.

The spelling of 49821440 in words is "forty-nine million, eight hundred twenty-one thousand, four hundred forty".