680021478 has 12 divisors (see below), whose sum is σ = 1473379908. Its totient is φ = 226673820.

The previous prime is 680021477. The next prime is 680021567. The reversal of 680021478 is 874120086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680021477) 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 5 ways as a sum of consecutive naturals, for example, 18889468 + ... + 18889503.

It is an arithmetic number, because the mean of its divisors is an integer number (122781659).

Almost surely, 2^680021478 is an apocalyptic number.

680021478 is an abundant number, since it is smaller than the sum of its proper divisors (793358430).

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

680021478 is a wasteful number, since it uses less digits than its factorization.

680021478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37778979 (or 37778976 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 680021478 is about 26077.2214394095. The cubic root of 680021478 is about 879.3751926781.

The spelling of 680021478 in words is "six hundred eighty million, twenty-one thousand, four hundred seventy-eight".