561827750 has 32 divisors (see below), whose sum is σ = 1147360032. Its totient is φ = 204300000.

The previous prime is 561827737. The next prime is 561827767. The reversal of 561827750 is 57728165.

It is a junction number, because it is equal to n+sod(n) for n = 561827698 and 561827707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99401 + ... + 104900.

It is an arithmetic number, because the mean of its divisors is an integer number (35855001).

Almost surely, 2^561827750 is an apocalyptic number.

561827750 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561827750 is an abundant number, since it is smaller than the sum of its proper divisors (585532282).

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

561827750 is a wasteful number, since it uses less digits than its factorization.

561827750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204329 (or 204319 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 41.

The square root of 561827750 is about 23702.9059399897. The cubic root of 561827750 is about 825.1528336382.

The spelling of 561827750 in words is "five hundred sixty-one million, eight hundred twenty-seven thousand, seven hundred fifty".