1945281296 has 40 divisors (see below), whose sum is σ = 4309545600. Its totient is φ = 833278464.

The previous prime is 1945281269. The next prime is 1945281319. The reversal of 1945281296 is 6921825491.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1945281296.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357605 + ... + 363003.

It is an arithmetic number, because the mean of its divisors is an integer number (107738640).

Almost surely, 2^1945281296 is an apocalyptic number.

1945281296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1945281296 is an abundant number, since it is smaller than the sum of its proper divisors (2364264304).

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

1945281296 is a wasteful number, since it uses less digits than its factorization.

1945281296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8631 (or 8625 counting only the distinct ones).

The product of its digits is 311040, while the sum is 47.

The square root of 1945281296 is about 44105.3431683736. The cubic root of 1945281296 is about 1248.3244314596.

The spelling of 1945281296 in words is "one billion, nine hundred forty-five million, two hundred eighty-one thousand, two hundred ninety-six".