518238940 has 48 divisors (see below), whose sum is σ = 1110896640. Its totient is φ = 203031360.

The previous prime is 518238923. The next prime is 518238953. The reversal of 518238940 is 49832815.

It is a junction number, because it is equal to n+sod(n) for n = 518238893 and 518238902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230341 + ... + 232579.

It is an arithmetic number, because the mean of its divisors is an integer number (23143680).

Almost surely, 2^518238940 is an apocalyptic number.

It is an amenable number.

518238940 is an abundant number, since it is smaller than the sum of its proper divisors (592657700).

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

518238940 is a wasteful number, since it uses less digits than its factorization.

518238940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482 (or 2480 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 518238940 is about 22764.8619587293. The cubic root of 518238940 is about 803.2363379081.

The spelling of 518238940 in words is "five hundred eighteen million, two hundred thirty-eight thousand, nine hundred forty".