40020024 has 48 divisors (see below), whose sum is σ = 109980360. Its totient is φ = 12126400.

The previous prime is 40020017. The next prime is 40020037. The reversal of 40020024 is 42002004.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 40019991 and 40020009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3987 + ... + 9794.

Almost surely, 2^40020024 is an apocalyptic number.

40020024 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40020024 is an abundant number, since it is smaller than the sum of its proper divisors (69960336).

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

40020024 is a wasteful number, since it uses less digits than its factorization.

40020024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13812 (or 13797 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 40020024 is about 6326.1381584660. The cubic root of 40020024 is about 342.0522474126.

Adding to 40020024 its reverse (42002004), we get a palindrome (82022028).

The spelling of 40020024 in words is "forty million, twenty thousand, twenty-four".