40020454 has 8 divisors (see below), whose sum is σ = 60649848. Its totient is φ = 19803840.

The previous prime is 40020451. The next prime is 40020457. The reversal of 40020454 is 45402004.

40020454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40020451) and next prime (40020457).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40020454² = 3203273476732232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40020451) 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, 102952 + ... + 103339.

It is an arithmetic number, because the mean of its divisors is an integer number (7581231).

Almost surely, 2^40020454 is an apocalyptic number.

40020454 is a deficient number, since it is larger than the sum of its proper divisors (20629394).

40020454 is a wasteful number, since it uses less digits than its factorization.

40020454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206390.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 40020454 is about 6326.1721443540. The cubic root of 40020454 is about 342.0534724821.

Adding to 40020454 its reverse (45402004), we get a palindrome (85422458).

The spelling of 40020454 in words is "forty million, twenty thousand, four hundred fifty-four".