2145604340 has 48 divisors (see below), whose sum is σ = 5204533824. Its totient is φ = 734323200.

The previous prime is 2145604319. The next prime is 2145604367. The reversal of 2145604340 is 434065412.

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, 283106 + ... + 290585.

It is an arithmetic number, because the mean of its divisors is an integer number (108427788).

Almost surely, 2^2145604340 is an apocalyptic number.

2145604340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145604340 is an abundant number, since it is smaller than the sum of its proper divisors (3058929484).

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

2145604340 is a wasteful number, since it uses less digits than its factorization.

2145604340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573728 (or 573726 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 2145604340 is about 46320.6686048464. The cubic root of 2145604340 is about 1289.7826968063.

Adding to 2145604340 its reverse (434065412), we get a palindrome (2579669752).

The spelling of 2145604340 in words is "two billion, one hundred forty-five million, six hundred four thousand, three hundred forty".