670220928 has 96 divisors (see below), whose sum is σ = 2077033140. Its totient is φ = 206217216.

The previous prime is 670220917. The next prime is 670220959. The reversal of 670220928 is 829022076.

It can be written as a sum of positive squares in 2 ways, for example, as 619412544 + 50808384 = 24888^2 + 7128^2 .

It is a tau number, because it is divible by the number of its divisors (96).

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 = 670220892 and 670220901.

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 11 ways as a sum of consecutive naturals, for example, 7401 + ... + 37352.

Almost surely, 2^670220928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670220928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1038516570).

670220928 is an abundant number, since it is smaller than the sum of its proper divisors (1406812212).

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

670220928 is a wasteful number, since it uses less digits than its factorization.

670220928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44786 (or 44771 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 670220928 is about 25888.6254559797. The cubic root of 670220928 is about 875.1301805766.

The spelling of 670220928 in words is "six hundred seventy million, two hundred twenty thousand, nine hundred twenty-eight".