515000040 has 128 divisors (see below), whose sum is σ = 1680341760. Its totient is φ = 125743104.

The previous prime is 515000033. The next prime is 515000041. The reversal of 515000040 is 40000515.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 514999983 and 515000019.

It is not an unprimeable number, because it can be changed into a prime (515000041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72069 + ... + 78891.

It is an arithmetic number, because the mean of its divisors is an integer number (13127670).

Almost surely, 2^515000040 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 515000040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (840170880).

515000040 is an abundant number, since it is smaller than the sum of its proper divisors (1165341720).

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

515000040 is a wasteful number, since it uses less digits than its factorization.

515000040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6891 (or 6887 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 515000040 is about 22693.6123171257. The cubic root of 515000040 is about 801.5594788900.

Adding to 515000040 its reverse (40000515), we get a palindrome (555000555).

The spelling of 515000040 in words is "five hundred fifteen million, forty", and thus it is an aban number.