40000824 has 32 divisors (see below), whose sum is σ = 111114000. Its totient is φ = 13333536.

The previous prime is 40000799. The next prime is 40000837. The reversal of 40000824 is 42800004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 40000797 and 40000806.

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, 92379 + ... + 92810.

Almost surely, 2^40000824 is an apocalyptic number.

It is an amenable number.

40000824 is an abundant number, since it is smaller than the sum of its proper divisors (71113176).

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

40000824 is a wasteful number, since it uses less digits than its factorization.

40000824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185204 (or 185194 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 40000824 is about 6324.6204629211. The cubic root of 40000824 is about 341.9975376862.

Adding to 40000824 its reverse (42800004), we get a palindrome (82800828).

The spelling of 40000824 in words is "forty million, eight hundred twenty-four", and thus it is an aban number.