1207920812 has 36 divisors (see below), whose sum is σ = 2440574640. Its totient is φ = 512433600.

The previous prime is 1207920809. The next prime is 1207920871. The reversal of 1207920812 is 2180297021.

It is a happy number.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 283514 + ... + 287742.

It is an arithmetic number, because the mean of its divisors is an integer number (67793740).

Almost surely, 2^1207920812 is an apocalyptic number.

It is an amenable number.

1207920812 is an abundant number, since it is smaller than the sum of its proper divisors (1232653828).

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

1207920812 is a wasteful number, since it uses less digits than its factorization.

1207920812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4442 (or 4339 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 1207920812 is about 34755.1551859577. The cubic root of 1207920812 is about 1064.9915321830.

The spelling of 1207920812 in words is "one billion, two hundred seven million, nine hundred twenty thousand, eight hundred twelve".