685578044 has 12 divisors (see below), whose sum is σ = 1206391368. Its totient is φ = 340894800.

The previous prime is 685578031. The next prime is 685578079. The reversal of 685578044 is 440875586.

It is a self number, because there is not a number n which added to its sum of digits gives 685578044.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472742 + ... + 474189.

It is an arithmetic number, because the mean of its divisors is an integer number (100532614).

Almost surely, 2^685578044 is an apocalyptic number.

It is an amenable number.

685578044 is a deficient number, since it is larger than the sum of its proper divisors (520813324).

685578044 is a wasteful number, since it uses less digits than its factorization.

685578044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947116 (or 947114 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 47.

The square root of 685578044 is about 26183.5452908883. The cubic root of 685578044 is about 881.7638708838.

The spelling of 685578044 in words is "six hundred eighty-five million, five hundred seventy-eight thousand, forty-four".