440827821 has 48 divisors (see below), whose sum is σ = 769167360. Its totient is φ = 237837600.

The previous prime is 440827813. The next prime is 440827889. The reversal of 440827821 is 128728044.

It is not a de Polignac number, because 440827821 - 2³ = 440827813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440827421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 112546 + ... + 116396.

It is an arithmetic number, because the mean of its divisors is an integer number (16024320).

Almost surely, 2^440827821 is an apocalyptic number.

It is an amenable number.

440827821 is a deficient number, since it is larger than the sum of its proper divisors (328339539).

440827821 is a wasteful number, since it uses less digits than its factorization.

440827821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3966 (or 3963 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 440827821 is about 20995.9000997814. The cubic root of 440827821 is about 761.0671878552.

The spelling of 440827821 in words is "four hundred forty million, eight hundred twenty-seven thousand, eight hundred twenty-one".