440004021 has 8 divisors (see below), whose sum is σ = 588034944. Its totient is φ = 292654560.

The previous prime is 440004011. The next prime is 440004023. The reversal of 440004021 is 120400044.

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

It is not a de Polignac number, because 440004021 - 2¹⁴ = 439987637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440004023) 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, 168856 + ... + 171441.

It is an arithmetic number, because the mean of its divisors is an integer number (73504368).

Almost surely, 2^440004021 is an apocalyptic number.

It is an amenable number.

440004021 is a deficient number, since it is larger than the sum of its proper divisors (148030923).

440004021 is a wasteful number, since it uses less digits than its factorization.

440004021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340731.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 440004021 is about 20976.2728100108. The cubic root of 440004021 is about 760.5928090652.

Adding to 440004021 its reverse (120400044), we get a palindrome (560404065).

It can be divided in two parts, 4400040 and 21, that added together give a triangular number (4400061 = T₂₉₆₆).

The spelling of 440004021 in words is "four hundred forty million, four thousand, twenty-one".