680370444 has 36 divisors (see below), whose sum is σ = 1852120816. Its totient is φ = 209344608.

The previous prime is 680370433. The next prime is 680370463. The reversal of 680370444 is 444073086.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 680370399 and 680370408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 726424 + ... + 727359.

Almost surely, 2^680370444 is an apocalyptic number.

It is an amenable number.

680370444 is an abundant number, since it is smaller than the sum of its proper divisors (1171750372).

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

680370444 is a wasteful number, since it uses less digits than its factorization.

680370444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453806 (or 1453801 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 680370444 is about 26083.9115931641. The cubic root of 680370444 is about 879.5255896758.

The spelling of 680370444 in words is "six hundred eighty million, three hundred seventy thousand, four hundred forty-four".