1645132304 has 20 divisors (see below), whose sum is σ = 3290265600. Its totient is φ = 796031520.

The previous prime is 1645132297. The next prime is 1645132351. The reversal of 1645132304 is 4032315461.

1645132304 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1657904 + ... + 1658895.

It is an arithmetic number, because the mean of its divisors is an integer number (164513280).

Almost surely, 2^1645132304 is an apocalyptic number.

It is an amenable number.

1645132304 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1645132304 is a wasteful number, since it uses less digits than its factorization.

1645132304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3316838 (or 3316832 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1645132304 is about 40560.2305713367. The cubic root of 1645132304 is about 1180.5025877833.

Adding to 1645132304 its reverse (4032315461), we get a palindrome (5677447765).

The spelling of 1645132304 in words is "one billion, six hundred forty-five million, one hundred thirty-two thousand, three hundred four".