515139040 has 72 divisors (see below), whose sum is σ = 1317903048. Its totient is φ = 190195200.

The previous prime is 515139019. The next prime is 515139061. The reversal of 515139040 is 40931515.

It is an interprime number because it is at equal distance from previous prime (515139019) and next prime (515139061).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17515 + ... + 36565.

It is an arithmetic number, because the mean of its divisors is an integer number (18304209).

Almost surely, 2^515139040 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 515139040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (658951524).

515139040 is an abundant number, since it is smaller than the sum of its proper divisors (802764008).

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

515139040 is a wasteful number, since it uses less digits than its factorization.

515139040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19092 (or 19071 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 515139040 is about 22696.6746463001. The cubic root of 515139040 is about 801.6315868101.

The spelling of 515139040 in words is "five hundred fifteen million, one hundred thirty-nine thousand, forty".