49997440 has 32 divisors (see below), whose sum is σ = 119526660. Its totient is φ = 19998720.

The previous prime is 49997411. The next prime is 49997447. The reversal of 49997440 is 4479994.

49997440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 49900096 + 97344 = 7064^2 + 312^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (49997447) 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 3 ways as a sum of consecutive naturals, for example, 38421 + ... + 39700.

Almost surely, 2^49997440 is an apocalyptic number.

49997440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49997440 is an abundant number, since it is smaller than the sum of its proper divisors (69529220).

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

49997440 is an equidigital number, since it uses as much as digits as its factorization.

49997440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78140 (or 78128 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 49997440 is about 7070.8867902124. The cubic root of 49997440 is about 368.3968623430.

The spelling of 49997440 in words is "forty-nine million, nine hundred ninety-seven thousand, four hundred forty".