561237238 has 16 divisors (see below), whose sum is σ = 910116720. Its totient is φ = 258663456.

The previous prime is 561237227. The next prime is 561237263. The reversal of 561237238 is 832732165.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 561237197 and 561237206.

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 7 ways as a sum of consecutive naturals, for example, 198181 + ... + 200992.

It is an arithmetic number, because the mean of its divisors is an integer number (56882295).

Almost surely, 2^561237238 is an apocalyptic number.

561237238 is a deficient number, since it is larger than the sum of its proper divisors (348879482).

561237238 is a wasteful number, since it uses less digits than its factorization.

561237238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399231.

The product of its digits is 60480, while the sum is 37.

The square root of 561237238 is about 23690.4461334100. The cubic root of 561237238 is about 824.8636385583.

The spelling of 561237238 in words is "five hundred sixty-one million, two hundred thirty-seven thousand, two hundred thirty-eight".