40449216 has 56 divisors (see below), whose sum is σ = 107679744. Its totient is φ = 13400320.

The previous prime is 40449209. The next prime is 40449217. The reversal of 40449216 is 61294404.

It is a super-2 number, since 2×40449216² = 3272278150029312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40449217) 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, 36121 + ... + 37223.

Almost surely, 2^40449216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40449216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53839872).

40449216 is an abundant number, since it is smaller than the sum of its proper divisors (67230528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40449216 is a wasteful number, since it uses less digits than its factorization.

40449216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309 (or 1299 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 40449216 is about 6359.9698112491. The cubic root of 40449216 is about 343.2706740419.

The spelling of 40449216 in words is "forty million, four hundred forty-nine thousand, two hundred sixteen".