509682440 has 64 divisors (see below), whose sum is σ = 1242552960. Its totient is φ = 187407360.

The previous prime is 509682431. The next prime is 509682451. The reversal of 509682440 is 44286905.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 509682394 and 509682403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20525 + ... + 37955.

It is an arithmetic number, because the mean of its divisors is an integer number (19414890).

Almost surely, 2^509682440 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 509682440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (621276480).

509682440 is an abundant number, since it is smaller than the sum of its proper divisors (732870520).

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

509682440 is a wasteful number, since it uses less digits than its factorization.

509682440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17502 (or 17498 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 509682440 is about 22576.1475898790. The cubic root of 509682440 is about 798.7911116564.

The spelling of 509682440 in words is "five hundred nine million, six hundred eighty-two thousand, four hundred forty".