40402024 has 16 divisors (see below), whose sum is σ = 81581220. Its totient is φ = 18647040.

The previous prime is 40402009. The next prime is 40402027. The reversal of 40402024 is 42020404.

It can be written as a sum of positive squares in 2 ways, for example, as 40322500 + 79524 = 6350^2 + 282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40401989 and 40402007.

It is not an unprimeable number, because it can be changed into a prime (40402027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194137 + ... + 194344.

Almost surely, 2^40402024 is an apocalyptic number.

It is an amenable number.

40402024 is an abundant number, since it is smaller than the sum of its proper divisors (41179196).

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

40402024 is a wasteful number, since it uses less digits than its factorization.

40402024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388500 (or 388496 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 40402024 is about 6356.2586479784. The cubic root of 40402024 is about 343.1371244097.

Adding to 40402024 its reverse (42020404), we get a palindrome (82422428).

The spelling of 40402024 in words is "forty million, four hundred two thousand, twenty-four".