40454639 has 8 divisors (see below), whose sum is σ = 41404608. Its totient is φ = 39508480.

The previous prime is 40454563. The next prime is 40454647. The reversal of 40454639 is 93645404.

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

It is a cyclic number.

It is not a de Polignac number, because 40454639 - 2¹⁶ = 40389103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40454599 and 40454608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40454669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40919 + ... + 41895.

It is an arithmetic number, because the mean of its divisors is an integer number (5175576).

Almost surely, 2^40454639 is an apocalyptic number.

40454639 is a deficient number, since it is larger than the sum of its proper divisors (949969).

40454639 is an equidigital number, since it uses as much as digits as its factorization.

40454639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 40454639 is about 6360.3961354620. The cubic root of 40454639 is about 343.2860140481.

The spelling of 40454639 in words is "forty million, four hundred fifty-four thousand, six hundred thirty-nine".