40448815 has 16 divisors (see below), whose sum is σ = 55739520. Its totient is φ = 27868320.

The previous prime is 40448801. The next prime is 40448819. The reversal of 40448815 is 51884404.

It is not a de Polignac number, because 40448815 - 2⁷ = 40448687 is a prime.

It is a super-2 number, since 2×40448815² = 3272213269808450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40448819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18309 + ... + 20398.

It is an arithmetic number, because the mean of its divisors is an integer number (3483720).

Almost surely, 2^40448815 is an apocalyptic number.

40448815 is a deficient number, since it is larger than the sum of its proper divisors (15290705).

40448815 is a wasteful number, since it uses less digits than its factorization.

40448815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38742.

The product of its (nonzero) digits is 20480, while the sum is 34.

The square root of 40448815 is about 6359.9382858641. The cubic root of 40448815 is about 343.2695396813.

The spelling of 40448815 in words is "forty million, four hundred forty-eight thousand, eight hundred fifteen".