561827238 has 24 divisors (see below), whose sum is σ = 1307108952. Its totient is φ = 160521984.

The previous prime is 561827221. The next prime is 561827239. The reversal of 561827238 is 832728165.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 561827238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561827239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 955195 + ... + 955782.

It is an arithmetic number, because the mean of its divisors is an integer number (54462873).

Almost surely, 2^561827238 is an apocalyptic number.

561827238 is an abundant number, since it is smaller than the sum of its proper divisors (745281714).

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

561827238 is a wasteful number, since it uses less digits than its factorization.

561827238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910996 (or 1910989 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 561827238 is about 23702.8951396238. The cubic root of 561827238 is about 825.1525829811.

The spelling of 561827238 in words is "five hundred sixty-one million, eight hundred twenty-seven thousand, two hundred thirty-eight".