670443228 has 144 divisors (see below), whose sum is σ = 2158054080. Its totient is φ = 170698752.

The previous prime is 670443209. The next prime is 670443251. The reversal of 670443228 is 822344076.

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 = 670443192 and 670443201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91476 + ... + 98532.

Almost surely, 2^670443228 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 670443228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1079027040).

670443228 is an abundant number, since it is smaller than the sum of its proper divisors (1487610852).

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

670443228 is a wasteful number, since it uses less digits than its factorization.

670443228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7116 (or 7111 counting only the distinct ones).

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

The square root of 670443228 is about 25892.9184913559. The cubic root of 670443228 is about 875.2269247627.

The spelling of 670443228 in words is "six hundred seventy million, four hundred forty-three thousand, two hundred twenty-eight".