670670028 has 72 divisors (see below), whose sum is σ = 1957536672. Its totient is φ = 189637632.

The previous prime is 670670023. The next prime is 670670057. The reversal of 670670028 is 820076076.

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 = 670669974 and 670670001.

It is not an unprimeable number, because it can be changed into a prime (670670023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10726 + ... + 38162.

Almost surely, 2^670670028 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 670670028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (978768336).

670670028 is an abundant number, since it is smaller than the sum of its proper divisors (1286866644).

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

670670028 is a wasteful number, since it uses less digits than its factorization.

670670028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27551 (or 27546 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 670670028 is about 25897.2976968640. The cubic root of 670670028 is about 875.3256052968.

The spelling of 670670028 in words is "six hundred seventy million, six hundred seventy thousand, twenty-eight".