501636340 has 24 divisors (see below), whose sum is σ = 1115403912. Its totient is φ = 188851200.

The previous prime is 501636337. The next prime is 501636341. The reversal of 501636340 is 43636105.

It can be written as a sum of positive squares in 4 ways, for example, as 135908964 + 365727376 = 11658^2 + 19124^2 .

It is a junction number, because it is equal to n+sod(n) for n = 501636299 and 501636308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501636341) 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, 737361 + ... + 738040.

It is an arithmetic number, because the mean of its divisors is an integer number (46475163).

Almost surely, 2^501636340 is an apocalyptic number.

It is an amenable number.

501636340 is an abundant number, since it is smaller than the sum of its proper divisors (613767572).

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

501636340 is a wasteful number, since it uses less digits than its factorization.

501636340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475427 (or 1475425 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 501636340 is about 22397.2395620532. The cubic root of 501636340 is about 794.5654257682.

The spelling of 501636340 in words is "five hundred one million, six hundred thirty-six thousand, three hundred forty".