40023072 has 72 divisors (see below), whose sum is σ = 118053936. Its totient is φ = 13338432.

The previous prime is 40023041. The next prime is 40023089. The reversal of 40023072 is 27032004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

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

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, 5203 + ... + 10349.

It is an arithmetic number, because the mean of its divisors is an integer number (1639638).

Almost surely, 2^40023072 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 40023072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59026968).

40023072 is an abundant number, since it is smaller than the sum of its proper divisors (78030864).

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

40023072 is an equidigital number, since it uses as much as digits as its factorization.

40023072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5172 (or 5152 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 40023072 is about 6326.3790591459. The cubic root of 40023072 is about 342.0609309721.

Adding to 40023072 its reverse (27032004), we get a palindrome (67055076).

The spelling of 40023072 in words is "forty million, twenty-three thousand, seventy-two".