40008224 has 48 divisors (see below), whose sum is σ = 86546880. Its totient is φ = 18120960.

The previous prime is 40008223. The next prime is 40008277. The reversal of 40008224 is 42280004.

It is a junction number, because it is equal to n+sod(n) for n = 40008196 and 40008205.

It is not an unprimeable number, because it can be changed into a prime (40008223) 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, 12554 + ... + 15414.

It is an arithmetic number, because the mean of its divisors is an integer number (1803060).

Almost surely, 2^40008224 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 40008224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43273440).

40008224 is an abundant number, since it is smaller than the sum of its proper divisors (46538656).

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

40008224 is a wasteful number, since it uses less digits than its factorization.

40008224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2913 (or 2905 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 40008224 is about 6325.2054512087. The cubic root of 40008224 is about 342.0186257995.

Adding to 40008224 its reverse (42280004), we get a palindrome (82288228).

The spelling of 40008224 in words is "forty million, eight thousand, two hundred twenty-four".