40045427 has 4 divisors (see below), whose sum is σ = 40976760. Its totient is φ = 39114096.

The previous prime is 40045409. The next prime is 40045441. The reversal of 40045427 is 72454004.

40045427 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 is a cyclic number.

It is not a de Polignac number, because 40045427 - 2²⁴ = 23268211 is a prime.

It is a super-2 number, since 2×40045427² = 3207272447224658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40045396 and 40045405.

It is not an unprimeable number, because it can be changed into a prime (40045487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465602 + ... + 465687.

It is an arithmetic number, because the mean of its divisors is an integer number (10244190).

Almost surely, 2^40045427 is an apocalyptic number.

40045427 is a deficient number, since it is larger than the sum of its proper divisors (931333).

40045427 is an equidigital number, since it uses as much as digits as its factorization.

40045427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931332.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 40045427 is about 6328.1456209541. The cubic root of 40045427 is about 342.1246054850.

The spelling of 40045427 in words is "forty million, forty-five thousand, four hundred twenty-seven".