5681520 has 120 divisors (see below), whose sum is σ = 20582016. Its totient is φ = 1396224.

The previous prime is 5681509. The next prime is 5681521. The reversal of 5681520 is 251865.

It is a tau number, because it is divible by the number of its divisors (120).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5681521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9057 + ... + 9663.

Almost surely, 2^5681520 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 5681520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10291008).

5681520 is an abundant number, since it is smaller than the sum of its proper divisors (14900496).

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

5681520 is a wasteful number, since it uses less digits than its factorization.

5681520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 5681520 is about 2383.5939251475. The cubic root of 5681520 is about 178.4383422853.

The spelling of 5681520 in words is "five million, six hundred eighty-one thousand, five hundred twenty".