501491232 has 144 divisors (see below), whose sum is σ = 1563831360. Its totient is φ = 151180800.

The previous prime is 501491231. The next prime is 501491251. The reversal of 501491232 is 232194105.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 501491196 and 501491205.

It is not an unprimeable number, because it can be changed into a prime (501491231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 984994 + ... + 985502.

It is an arithmetic number, because the mean of its divisors is an integer number (10859940).

Almost surely, 2^501491232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 501491232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781915680).

501491232 is an abundant number, since it is smaller than the sum of its proper divisors (1062340128).

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

501491232 is a wasteful number, since it uses less digits than its factorization.

501491232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 501491232 is about 22393.9999106904. Note that the first 4 decimals coincide. The cubic root of 501491232 is about 794.4888039144.

The spelling of 501491232 in words is "five hundred one million, four hundred ninety-one thousand, two hundred thirty-two".