787644216 has 64 divisors (see below), whose sum is σ = 2190240000. Its totient is φ = 262267488.

The previous prime is 787644211. The next prime is 787644233. The reversal of 787644216 is 612446787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787644211) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 335575 + ... + 337913.

It is an arithmetic number, because the mean of its divisors is an integer number (34222500).

Almost surely, 2^787644216 is an apocalyptic number.

It is an amenable number.

787644216 is an abundant number, since it is smaller than the sum of its proper divisors (1402595784).

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

787644216 is a wasteful number, since it uses less digits than its factorization.

787644216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3913 (or 3903 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 787644216 is about 28064.9998396579. Note that the first 3 decimals coincide. The cubic root of 787644216 is about 923.5137431393.

The spelling of 787644216 in words is "seven hundred eighty-seven million, six hundred forty-four thousand, two hundred sixteen".