518438040 has 64 divisors (see below), whose sum is σ = 1557964800. Its totient is φ = 138014592.

The previous prime is 518438029. The next prime is 518438077. The reversal of 518438040 is 40834815.

It is a junction number, because it is equal to n+sod(n) for n = 518437992 and 518438010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73801 + ... + 80519.

It is an arithmetic number, because the mean of its divisors is an integer number (24343200).

Almost surely, 2^518438040 is an apocalyptic number.

It is an amenable number.

518438040 is an abundant number, since it is smaller than the sum of its proper divisors (1039526760).

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

518438040 is a wasteful number, since it uses less digits than its factorization.

518438040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7376 (or 7372 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 518438040 is about 22769.2345062367. The cubic root of 518438040 is about 803.3391887148.

The spelling of 518438040 in words is "five hundred eighteen million, four hundred thirty-eight thousand, forty".