1642104128 has 56 divisors (see below), whose sum is σ = 3732605184. Its totient is φ = 702144000.

The previous prime is 1642104119. The next prime is 1642104133. The reversal of 1642104128 is 8214012461.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 1642104128.

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, 202553 + ... + 210503.

It is an arithmetic number, because the mean of its divisors is an integer number (66653664).

Almost surely, 2^1642104128 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 1642104128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1866302592).

1642104128 is an abundant number, since it is smaller than the sum of its proper divisors (2090501056).

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

1642104128 is an equidigital number, since it uses as much as digits as its factorization.

1642104128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8431 (or 8421 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 1642104128 is about 40522.8840039798. The cubic root of 1642104128 is about 1179.7778304316. Note that the first 3 decimals are identical.

Adding to 1642104128 its reverse (8214012461), we get a palindrome (9856116589).

The spelling of 1642104128 in words is "one billion, six hundred forty-two million, one hundred four thousand, one hundred twenty-eight".