40756645 has 4 divisors (see below), whose sum is σ = 48907980. Its totient is φ = 32605312.

The previous prime is 40756643. The next prime is 40756649. The reversal of 40756645 is 54665704.

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 2 ways, for example, as 10131489 + 30625156 = 3183^2 + 5534^2 .

It is a cyclic number.

It is not a de Polignac number, because 40756645 - 2¹ = 40756643 is a prime.

It is a super-2 number, since 2×40756645² = 3322208223312050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40756643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4075660 + ... + 4075669.

It is an arithmetic number, because the mean of its divisors is an integer number (12226995).

Almost surely, 2^40756645 is an apocalyptic number.

It is an amenable number.

40756645 is a deficient number, since it is larger than the sum of its proper divisors (8151335).

40756645 is an equidigital number, since it uses as much as digits as its factorization.

40756645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8151334.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 40756645 is about 6384.0931227544. The cubic root of 40756645 is about 344.1381414043.

The spelling of 40756645 in words is "forty million, seven hundred fifty-six thousand, six hundred forty-five".