678622636 has 48 divisors (see below), whose sum is σ = 1261209600. Its totient is φ = 318859200.

The previous prime is 678622589. The next prime is 678622667. The reversal of 678622636 is 636226876.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1848925 + ... + 1849291.

It is an arithmetic number, because the mean of its divisors is an integer number (26275200).

Almost surely, 2^678622636 is an apocalyptic number.

It is an amenable number.

678622636 is a deficient number, since it is larger than the sum of its proper divisors (582586964).

678622636 is a wasteful number, since it uses less digits than its factorization.

678622636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694 (or 692 counting only the distinct ones).

The product of its digits is 870912, while the sum is 46.

The square root of 678622636 is about 26050.3864846570. The cubic root of 678622636 is about 878.7718041948.

The spelling of 678622636 in words is "six hundred seventy-eight million, six hundred twenty-two thousand, six hundred thirty-six".