1642906608 has 160 divisors (see below), whose sum is σ = 5058009600. Its totient is φ = 449584128.

The previous prime is 1642906589. The next prime is 1642906609. The reversal of 1642906608 is 8066092461.

It is a super-2 number, since 2×1642906608² = 5398284245220131328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1642906608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642906609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1353810 + ... + 1355022.

It is an arithmetic number, because the mean of its divisors is an integer number (31612560).

Almost surely, 2^1642906608 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 1642906608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2529004800).

1642906608 is an abundant number, since it is smaller than the sum of its proper divisors (3415102992).

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

1642906608 is a wasteful number, since it uses less digits than its factorization.

1642906608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399 (or 1393 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 1642906608 is about 40532.7843603175. The cubic root of 1642906608 is about 1179.9699810423.

The spelling of 1642906608 in words is "one billion, six hundred forty-two million, nine hundred six thousand, six hundred eight".