5781556 has 48 divisors (see below), whose sum is σ = 11975040. Its totient is φ = 2414720.

The previous prime is 5781553. The next prime is 5781569. The reversal of 5781556 is 6551875.

It is a super-2 number, since 2×5781556² = 66852779562272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) 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 (5781553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29250 + ... + 29446.

It is an arithmetic number, because the mean of its divisors is an integer number (249480).

Almost surely, 2^5781556 is an apocalyptic number.

It is an amenable number.

5781556 is an abundant number, since it is smaller than the sum of its proper divisors (6193484).

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

5781556 is a wasteful number, since it uses less digits than its factorization.

5781556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 262 counting only the distinct ones).

The product of its digits is 42000, while the sum is 37.

The square root of 5781556 is about 2404.4866395969. The cubic root of 5781556 is about 179.4795252909.

The spelling of 5781556 in words is "five million, seven hundred eighty-one thousand, five hundred fifty-six".