1642444284 has 96 divisors (see below), whose sum is σ = 4374720000. Its totient is φ = 475428096.

The previous prime is 1642444267. The next prime is 1642444339. The reversal of 1642444284 is 4824442461.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 439777 + ... + 443495.

It is an arithmetic number, because the mean of its divisors is an integer number (45570000).

Almost surely, 2^1642444284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1642444284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2187360000).

1642444284 is an abundant number, since it is smaller than the sum of its proper divisors (2732275716).

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

1642444284 is a wasteful number, since it uses less digits than its factorization.

1642444284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907 (or 3905 counting only the distinct ones).

The product of its digits is 196608, while the sum is 39.

The square root of 1642444284 is about 40527.0808719306. The cubic root of 1642444284 is about 1179.8592870608.

The spelling of 1642444284 in words is "one billion, six hundred forty-two million, four hundred forty-four thousand, two hundred eighty-four".