444404391870 has 32 divisors (see below), whose sum is σ = 1095396774048. Its totient is φ = 115304923008.

The previous prime is 444404391803. The next prime is 444404391929. The reversal of 444404391870 is 78193404444.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

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, 200181049 + ... + 200183268.

It is an arithmetic number, because the mean of its divisors is an integer number (34231149189).

Almost surely, 2^444404391870 is an apocalyptic number.

444404391870 is an abundant number, since it is smaller than the sum of its proper divisors (650992382178).

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

444404391870 is a wasteful number, since it uses less digits than its factorization.

444404391870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400364364.

The product of its (nonzero) digits is 1548288, while the sum is 48.

The spelling of 444404391870 in words is "four hundred forty-four billion, four hundred four million, three hundred ninety-one thousand, eight hundred seventy".