40448945 has 4 divisors (see below), whose sum is σ = 48538740. Its totient is φ = 32359152.

The previous prime is 40448923. The next prime is 40448951. The reversal of 40448945 is 54984404.

40448945 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 can be written as a sum of positive squares in 2 ways, for example, as 17447329 + 23001616 = 4177^2 + 4796^2 .

It is a cyclic number.

It is not a de Polignac number, because 40448945 - 2¹² = 40444849 is a prime.

It is a super-2 number, since 2×40448945² = 3272234303226050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40448899 and 40448908.

It is an unprimeable number.

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, 4044890 + ... + 4044899.

It is an arithmetic number, because the mean of its divisors is an integer number (12134685).

Almost surely, 2^40448945 is an apocalyptic number.

It is an amenable number.

40448945 is a deficient number, since it is larger than the sum of its proper divisors (8089795).

40448945 is an equidigital number, since it uses as much as digits as its factorization.

40448945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8089794.

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 40448945 is about 6359.9485060808. The cubic root of 40448945 is about 343.2699074299.

The spelling of 40448945 in words is "forty million, four hundred forty-eight thousand, nine hundred forty-five".