515380440 has 32 divisors (see below), whose sum is σ = 1546141680. Its totient is φ = 137434752.

The previous prime is 515380433. The next prime is 515380469. The reversal of 515380440 is 44083515.

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 = 515380398 and 515380407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2147299 + ... + 2147538.

Almost surely, 2^515380440 is an apocalyptic number.

It is an amenable number.

515380440 is an abundant number, since it is smaller than the sum of its proper divisors (1030761240).

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

515380440 is a wasteful number, since it uses less digits than its factorization.

515380440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4294851 (or 4294847 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 515380440 is about 22701.9919830838. The cubic root of 515380440 is about 801.7567851419.

The spelling of 515380440 in words is "five hundred fifteen million, three hundred eighty thousand, four hundred forty".