40724816 has 80 divisors (see below), whose sum is σ = 91065600. Its totient is φ = 17472000.

The previous prime is 40724777. The next prime is 40724833. The reversal of 40724816 is 61842704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403166 + ... + 403266.

It is an arithmetic number, because the mean of its divisors is an integer number (1138320).

Almost surely, 2^40724816 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 40724816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45532800).

40724816 is an abundant number, since it is smaller than the sum of its proper divisors (50340784).

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

40724816 is a wasteful number, since it uses less digits than its factorization.

40724816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 40724816 is about 6381.5997994233. The cubic root of 40724816 is about 344.0485329037.

It can be divided in two parts, 4072 and 4816, that added together give a palindrome (8888).

The spelling of 40724816 in words is "forty million, seven hundred twenty-four thousand, eight hundred sixteen".