5781520 has 20 divisors (see below), whose sum is σ = 13442220. Its totient is φ = 2312576.

The previous prime is 5781499. The next prime is 5781539. The reversal of 5781520 is 251875.

It can be written as a sum of positive squares in 2 ways, for example, as 1971216 + 3810304 = 1404^2 + 1952^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a d-powerful number, because it can be written as 5 + 7⁸ + 8² + 1 + 5⁶ + 2¹⁰ + 0 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36055 + ... + 36214.

It is an arithmetic number, because the mean of its divisors is an integer number (672111).

Almost surely, 2^5781520 is an apocalyptic number.

It is an amenable number.

5781520 is an abundant number, since it is smaller than the sum of its proper divisors (7660700).

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

5781520 is a wasteful number, since it uses less digits than its factorization.

5781520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72282 (or 72276 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 5781520 is about 2404.4791535798. The cubic root of 5781520 is about 179.4791527686.

The spelling of 5781520 in words is "five million, seven hundred eighty-one thousand, five hundred twenty".