50440140 has 36 divisors (see below), whose sum is σ = 153002304. Its totient is φ = 13450656.

The previous prime is 50440133. The next prime is 50440141. The reversal of 50440140 is 4104405.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (50440141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139932 + ... + 140291.

It is an arithmetic number, because the mean of its divisors is an integer number (4250064).

Almost surely, 2^50440140 is an apocalyptic number.

It is an amenable number.

50440140 is an abundant number, since it is smaller than the sum of its proper divisors (102562164).

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

50440140 is a wasteful number, since it uses less digits than its factorization.

50440140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280238 (or 280233 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 50440140 is about 7102.1222180416. The cubic root of 50440140 is about 369.4809864463.

Adding to 50440140 its reverse (4104405), we get a palindrome (54544545).

The spelling of 50440140 in words is "fifty million, four hundred forty thousand, one hundred forty".