515324640 has 48 divisors (see below), whose sum is σ = 1623274128. Its totient is φ = 137419776.

The previous prime is 515324609. The next prime is 515324647. The reversal of 515324640 is 46423515.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×515324640² = 531118969182259200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 515324598 and 515324607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515324647) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 536317 + ... + 537276.

It is an arithmetic number, because the mean of its divisors is an integer number (33818211).

Almost surely, 2^515324640 is an apocalyptic number.

It is an amenable number.

515324640 is an abundant number, since it is smaller than the sum of its proper divisors (1107949488).

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

515324640 is a wasteful number, since it uses less digits than its factorization.

515324640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073611 (or 1073603 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 515324640 is about 22700.7629827722. The cubic root of 515324640 is about 801.7278488197.

The spelling of 515324640 in words is "five hundred fifteen million, three hundred twenty-four thousand, six hundred forty".