501630 has 32 divisors (see below), whose sum is σ = 1257984. Its totient is φ = 127776.

The previous prime is 501623. The next prime is 501637. The reversal of 501630 is 36105.

It is an interprime number because it is at equal distance from previous prime (501623) and next prime (501637).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501637) by changing a digit.

501630 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327 + ... + 1053.

It is an arithmetic number, because the mean of its divisors is an integer number (39312).

2⁵⁰¹⁶³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 501630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628992).

501630 is an abundant number, since it is smaller than the sum of its proper divisors (756354).

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

501630 is a wasteful number, since it uses less digits than its factorization.

501630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 501630 is about 708.2584274119. The cubic root of 501630 is about 79.4562078346.

Adding to 501630 its reverse (36105), we get a palindrome (537735).

The spelling of 501630 in words is "five hundred one thousand, six hundred thirty".