1645408460 has 24 divisors (see below), whose sum is σ = 3459316896. Its totient is φ = 657409280.

The previous prime is 1645408451. The next prime is 1645408489. The reversal of 1645408460 is 648045461.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29072 + ... + 64311.

It is an arithmetic number, because the mean of its divisors is an integer number (144138204).

Almost surely, 2^1645408460 is an apocalyptic number.

1645408460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1645408460 is an abundant number, since it is smaller than the sum of its proper divisors (1813908436).

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

1645408460 is a wasteful number, since it uses less digits than its factorization.

1645408460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94273 (or 94271 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 1645408460 is about 40563.6346990750. The cubic root of 1645408460 is about 1180.5686381211.

The spelling of 1645408460 in words is "one billion, six hundred forty-five million, four hundred eight thousand, four hundred sixty".