515378790 has 48 divisors (see below), whose sum is σ = 1341194400. Its totient is φ = 137310336.

The previous prime is 515378777. The next prime is 515378791. The reversal of 515378790 is 97873515.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515378791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143031 + ... + 146589.

It is an arithmetic number, because the mean of its divisors is an integer number (27941550).

Almost surely, 2^515378790 is an apocalyptic number.

515378790 is an abundant number, since it is smaller than the sum of its proper divisors (825815610).

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

515378790 is a wasteful number, since it uses less digits than its factorization.

515378790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5181 (or 5178 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 45.

The square root of 515378790 is about 22701.9556426313. The cubic root of 515378790 is about 801.7559295279.

The spelling of 515378790 in words is "five hundred fifteen million, three hundred seventy-eight thousand, seven hundred ninety".