780321088 has 56 divisors (see below), whose sum is σ = 1603556864. Its totient is φ = 376358400.

The previous prime is 780321077. The next prime is 780321109. The reversal of 780321088 is 880123087.

It is a congruent number.

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, 1072981 + ... + 1073707.

It is an arithmetic number, because the mean of its divisors is an integer number (28634944).

Almost surely, 2^780321088 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 780321088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (801778432).

780321088 is an abundant number, since it is smaller than the sum of its proper divisors (823235776).

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

780321088 is a wasteful number, since it uses less digits than its factorization.

780321088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 780321088 is about 27934.2278933927. The cubic root of 780321088 is about 920.6427015101.

The spelling of 780321088 in words is "seven hundred eighty million, three hundred twenty-one thousand, eighty-eight".