561458738 has 4 divisors (see below), whose sum is σ = 842188110. Its totient is φ = 280729368.

The previous prime is 561458731. The next prime is 561458761. The reversal of 561458738 is 837854165.

561458738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 561358249 + 100489 = 23693^2 + 317^2 .

It is a junction number, because it is equal to n+sod(n) for n = 561458692 and 561458701.

It is not an unprimeable number, because it can be changed into a prime (561458731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140364683 + ... + 140364686.

Almost surely, 2^561458738 is an apocalyptic number.

561458738 is a deficient number, since it is larger than the sum of its proper divisors (280729372).

561458738 is a wasteful number, since it uses less digits than its factorization.

561458738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280729371.

The product of its digits is 806400, while the sum is 47.

The square root of 561458738 is about 23695.1205525526. The cubic root of 561458738 is about 824.9721388816.

The spelling of 561458738 in words is "five hundred sixty-one million, four hundred fifty-eight thousand, seven hundred thirty-eight".