4444453640 has 64 divisors (see below), whose sum is σ = 10920087360. Its totient is φ = 1614539520.

The previous prime is 4444453583. The next prime is 4444453661. The reversal of 4444453640 is 463544444.

It is a junction number, because it is equal to n+sod(n) for n = 4444453594 and 4444453603.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486959 + ... + 496001.

It is an arithmetic number, because the mean of its divisors is an integer number (170626365).

Almost surely, 2^4444453640 is an apocalyptic number.

4444453640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4444453640 is an abundant number, since it is smaller than the sum of its proper divisors (6475633720).

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

4444453640 is a wasteful number, since it uses less digits than its factorization.

4444453640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10182 (or 10178 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 38.

The square root of 4444453640 is about 66666.7356332977. The cubic root of 4444453640 is about 1644.1425167957.

The spelling of 4444453640 in words is "four billion, four hundred forty-four million, four hundred fifty-three thousand, six hundred forty".