440030021 has 8 divisors (see below), whose sum is σ = 455566080. Its totient is φ = 424518192.

The previous prime is 440029969. The next prime is 440030039. The reversal of 440030021 is 120030044.

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

It is a cyclic number.

It is not a de Polignac number, because 440030021 - 2⁶ = 440029957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 440029978 and 440030005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440030821) 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, 35936 + ... + 46598.

It is an arithmetic number, because the mean of its divisors is an integer number (56945760).

Almost surely, 2^440030021 is an apocalyptic number.

It is an amenable number.

440030021 is a deficient number, since it is larger than the sum of its proper divisors (15536059).

440030021 is a wasteful number, since it uses less digits than its factorization.

440030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12115.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 440030021 is about 20976.8925487070. The cubic root of 440030021 is about 760.6077900067.

Adding to 440030021 its reverse (120030044), we get a palindrome (560060065).

The spelling of 440030021 in words is "four hundred forty million, thirty thousand, twenty-one".