1945633320 has 48 divisors (see below), whose sum is σ = 6323309460. Its totient is φ = 518835456.

The previous prime is 1945633297. The next prime is 1945633331. The reversal of 1945633320 is 233365491.

It is a happy number.

1945633320 is a `hidden beast` number, since 1 + 94 + 563 + 3 + 3 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1912662756 + 32970564 = 43734^2 + 5742^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 2701909 + ... + 2702628.

Almost surely, 2^1945633320 is an apocalyptic number.

1945633320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1945633320 is an abundant number, since it is smaller than the sum of its proper divisors (4377676140).

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

1945633320 is a wasteful number, since it uses less digits than its factorization.

1945633320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5404554 (or 5404547 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 1945633320 is about 44109.3337061443. Note that the first 3 decimals coincide. The cubic root of 1945633320 is about 1248.3997271089.

The spelling of 1945633320 in words is "one billion, nine hundred forty-five million, six hundred thirty-three thousand, three hundred twenty".