49865440 has 24 divisors (see below), whose sum is σ = 117807480. Its totient is φ = 19946112.

The previous prime is 49865411. The next prime is 49865441. The reversal of 49865440 is 4456894.

49865440 = 851² + 852² + ... + 914².

49865440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 49865393 and 49865402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49865441) 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, 155670 + ... + 155989.

It is an arithmetic number, because the mean of its divisors is an integer number (4908645).

Almost surely, 2^49865440 is an apocalyptic number.

49865440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49865440 is an abundant number, since it is smaller than the sum of its proper divisors (67942040).

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

49865440 is a wasteful number, since it uses less digits than its factorization.

49865440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311674 (or 311666 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 49865440 is about 7061.5465728125. The cubic root of 49865440 is about 368.0723707698.

It can be divided in two parts, 49865 and 440, that added together give a palindrome (50305).

The spelling of 49865440 in words is "forty-nine million, eight hundred sixty-five thousand, four hundred forty".