501401440 has 48 divisors (see below), whose sum is σ = 1222784640. Its totient is φ = 194088960.

The previous prime is 501401429. The next prime is 501401441. The reversal of 501401440 is 44104105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501401441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45585 + ... + 55504.

It is an arithmetic number, because the mean of its divisors is an integer number (25474680).

Almost surely, 2^501401440 is an apocalyptic number.

It is an amenable number.

501401440 is an abundant number, since it is smaller than the sum of its proper divisors (721383200).

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

501401440 is a wasteful number, since it uses less digits than its factorization.

501401440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101135 (or 101127 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 501401440 is about 22391.9949982131. The cubic root of 501401440 is about 794.4413833466.

Adding to 501401440 its reverse (44104105), we get a palindrome (545505545).

The spelling of 501401440 in words is "five hundred one million, four hundred one thousand, four hundred forty".