787405680 has 240 divisors, whose sum is σ = 2802365280. Its totient is φ = 197793792.

The previous prime is 787405679. The next prime is 787405687. The reversal of 787405680 is 86504787.

787405680 is a `hidden beast` number, since 7 + 87 + 4 + 0 + 568 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787405687) 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 47 ways as a sum of consecutive naturals, for example, 897402 + ... + 898278.

It is an arithmetic number, because the mean of its divisors is an integer number (11676522).

Almost surely, 2^787405680 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 787405680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1401182640).

787405680 is an abundant number, since it is smaller than the sum of its proper divisors (2014959600).

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

787405680 is a wasteful number, since it uses less digits than its factorization.

787405680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968 (or 959 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 787405680 is about 28060.7498117923. The cubic root of 787405680 is about 923.4205058156.

The spelling of 787405680 in words is "seven hundred eighty-seven million, four hundred five thousand, six hundred eighty".