787487904 has 144 divisors (see below), whose sum is σ = 2586362688. Its totient is φ = 222621696.

The previous prime is 787487903. The next prime is 787487933. The reversal of 787487904 is 409784787.

787487904 is a `hidden beast` number, since 78 + 7 + 487 + 90 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (787487903) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 193539 + ... + 197565.

It is an arithmetic number, because the mean of its divisors is an integer number (17960852).

Almost surely, 2^787487904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 787487904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1293181344).

787487904 is an abundant number, since it is smaller than the sum of its proper divisors (1798874784).

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

787487904 is a wasteful number, since it uses less digits than its factorization.

787487904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4147 (or 4136 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The square root of 787487904 is about 28062.2148805115. The cubic root of 787487904 is about 923.4526470979.

The spelling of 787487904 in words is "seven hundred eighty-seven million, four hundred eighty-seven thousand, nine hundred four".