49531440 has 80 divisors (see below), whose sum is σ = 175488768. Its totient is φ = 11321088.

The previous prime is 49531439. The next prime is 49531441. The reversal of 49531440 is 4413594.

49531440 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 (49531439) and next prime (49531441).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 49531398 and 49531407.

It is not an unprimeable number, because it can be changed into a prime (49531441) 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, 13062 + ... + 16421.

Almost surely, 2^49531440 is an apocalyptic number.

49531440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49531440 is an abundant number, since it is smaller than the sum of its proper divisors (125957328).

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

49531440 is a wasteful number, since it uses less digits than its factorization.

49531440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29506 (or 29500 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 49531440 is about 7037.8576285685. The cubic root of 49531440 is about 367.2487430607.

The spelling of 49531440 in words is "forty-nine million, five hundred thirty-one thousand, four hundred forty".