40302021 has 8 divisors (see below), whose sum is σ = 56564320. Its totient is φ = 25453872.

The previous prime is 40302011. The next prime is 40302023. The reversal of 40302021 is 12020304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40302021 - 2¹⁵ = 40269253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40301988 and 40302006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40302023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353470 + ... + 353583.

It is an arithmetic number, because the mean of its divisors is an integer number (7070540).

Almost surely, 2^40302021 is an apocalyptic number.

It is an amenable number.

40302021 is a deficient number, since it is larger than the sum of its proper divisors (16262299).

40302021 is a wasteful number, since it uses less digits than its factorization.

40302021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707075.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 40302021 is about 6348.3872755212. The cubic root of 40302021 is about 342.8537797537.

Adding to 40302021 its reverse (12020304), we get a palindrome (52322325).

The spelling of 40302021 in words is "forty million, three hundred two thousand, twenty-one".