689076780 has 96 divisors (see below), whose sum is σ = 2300949504. Its totient is φ = 150653184.

The previous prime is 689076749. The next prime is 689076821. The reversal of 689076780 is 87670986.

It is a happy number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 26007 + ... + 45326.

It is an arithmetic number, because the mean of its divisors is an integer number (23968224).

Almost surely, 2^689076780 is an apocalyptic number.

689076780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

689076780 is an abundant number, since it is smaller than the sum of its proper divisors (1611872724).

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

689076780 is a wasteful number, since it uses less digits than its factorization.

689076780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71375 (or 71373 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 689076780 is about 26250.2719985908. The cubic root of 689076780 is about 883.2613059422.

The spelling of 689076780 in words is "six hundred eighty-nine million, seventy-six thousand, seven hundred eighty".