561788 has 18 divisors (see below), whose sum is σ = 1024296. Its totient is φ = 269584.

The previous prime is 561787. The next prime is 561797. The reversal of 561788 is 887165.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561787) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3281 + ... + 3447.

2⁵⁶¹⁷⁸⁸ is an apocalyptic number.

561788 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

561788 is a deficient number, since it is larger than the sum of its proper divisors (462508).

561788 is a wasteful number, since it uses less digits than its factorization.

561788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 198 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 561788 is about 749.5251830326. The cubic root of 561788 is about 82.5133372989.

It can be divided in two parts, 56 and 1788, that multiplied together give a triangular number (100128 = T₄₄₇).

The spelling of 561788 in words is "five hundred sixty-one thousand, seven hundred eighty-eight".