444921428628 has 18 divisors (see below), whose sum is σ = 1124662500234. Its totient is φ = 148307142864.

The previous prime is 444921428599. The next prime is 444921428629. The reversal of 444921428628 is 826824129444.

444921428628 is a `hidden beast` number, since 4 + 4 + 4 + 9 + 2 + 1 + 4 + 2 + 8 + 628 = 666.

It can be written as a sum of positive squares in only one way, i.e., 403603548804 + 41317879824 = 635298^2 + 203268^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444921428629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6179464251 + ... + 6179464322.

It is an arithmetic number, because the mean of its divisors is an integer number (62481250013).

Almost surely, 2^444921428628 is an apocalyptic number.

It is an amenable number.

444921428628 is an abundant number, since it is smaller than the sum of its proper divisors (679741071606).

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

444921428628 is a wasteful number, since it uses less digits than its factorization.

444921428628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12358928583 (or 12358928578 counting only the distinct ones).

The product of its digits is 7077888, while the sum is 54.

The spelling of 444921428628 in words is "four hundred forty-four billion, nine hundred twenty-one million, four hundred twenty-eight thousand, six hundred twenty-eight".