40436816 has 40 divisors (see below), whose sum is σ = 90083520. Its totient is φ = 17224704.

The previous prime is 40436797. The next prime is 40436821. The reversal of 40436816 is 61863404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19040 + ... + 21056.

It is an arithmetic number, because the mean of its divisors is an integer number (2252088).

Almost surely, 2^40436816 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 40436816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45041760).

40436816 is an abundant number, since it is smaller than the sum of its proper divisors (49646704).

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

40436816 is a wasteful number, since it uses less digits than its factorization.

40436816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211 (or 2205 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 40436816 is about 6358.9948891315. The cubic root of 40436816 is about 343.2355930868.

The spelling of 40436816 in words is "forty million, four hundred thirty-six thousand, eight hundred sixteen".