440479644 has 24 divisors (see below), whose sum is σ = 1121221248. Its totient is φ = 133478640.

The previous prime is 440479621. The next prime is 440479657. The reversal of 440479644 is 446974044.

It is a junction number, because it is equal to n+sod(n) for n = 440479596 and 440479605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1668352 + ... + 1668615.

It is an arithmetic number, because the mean of its divisors is an integer number (46717552).

Almost surely, 2^440479644 is an apocalyptic number.

440479644 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

440479644 is an abundant number, since it is smaller than the sum of its proper divisors (680741604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

440479644 is a wasteful number, since it uses less digits than its factorization.

440479644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336985 (or 3336983 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 42.

The square root of 440479644 is about 20987.6069145579. The cubic root of 440479644 is about 760.8667650201.

It can be divided in two parts, 4404 and 79644, that added together give a palindrome (84048).

The spelling of 440479644 in words is "four hundred forty million, four hundred seventy-nine thousand, six hundred forty-four".