40561634 has 4 divisors (see below), whose sum is σ = 60842454. Its totient is φ = 20280816.

The previous prime is 40561607. The next prime is 40561639. The reversal of 40561634 is 43616504.

It is a happy number.

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., 31888609 + 8673025 = 5647^2 + 2945^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40561597 and 40561606.

It is not an unprimeable number, because it can be changed into a prime (40561639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10140407 + ... + 10140410.

Almost surely, 2^40561634 is an apocalyptic number.

40561634 is a deficient number, since it is larger than the sum of its proper divisors (20280820).

40561634 is a wasteful number, since it uses less digits than its factorization.

40561634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20280819.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 40561634 is about 6368.8016141186. The cubic root of 40561634 is about 343.5883901928.

The spelling of 40561634 in words is "forty million, five hundred sixty-one thousand, six hundred thirty-four".