40024321 has 4 divisors (see below), whose sum is σ = 41404500. Its totient is φ = 38644144.

The previous prime is 40024297. The next prime is 40024339. The reversal of 40024321 is 12342004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9388096 + 30636225 = 3064^2 + 5535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40024321 is a prime.

It is a super-2 number, since 2×40024321² = 3203892543022082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40024295 and 40024304.

It is not an unprimeable number, because it can be changed into a prime (40024351) 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, 690046 + ... + 690103.

It is an arithmetic number, because the mean of its divisors is an integer number (10351125).

Almost surely, 2^40024321 is an apocalyptic number.

It is an amenable number.

40024321 is a deficient number, since it is larger than the sum of its proper divisors (1380179).

40024321 is a wasteful number, since it uses less digits than its factorization.

40024321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380178.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40024321 is about 6326.4777720308. The cubic root of 40024321 is about 342.0644891669.

Adding to 40024321 its reverse (12342004), we get a palindrome (52366325).

The spelling of 40024321 in words is "forty million, twenty-four thousand, three hundred twenty-one".