40408452 has 72 divisors (see below), whose sum is σ = 119613312. Its totient is φ = 11260800.

The previous prime is 40408429. The next prime is 40408453. The reversal of 40408452 is 25480404.

It is not an unprimeable number, because it can be changed into a prime (40408453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8377 + ... + 12287.

It is an arithmetic number, because the mean of its divisors is an integer number (1661296).

Almost surely, 2^40408452 is an apocalyptic number.

40408452 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40408452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59806656).

40408452 is an abundant number, since it is smaller than the sum of its proper divisors (79204860).

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

40408452 is a wasteful number, since it uses less digits than its factorization.

40408452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3969 (or 3964 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 40408452 is about 6356.7642712311. The cubic root of 40408452 is about 343.1553212577.

Adding to 40408452 its reverse (25480404), we get a palindrome (65888856).

The spelling of 40408452 in words is "forty million, four hundred eight thousand, four hundred fifty-two".