670943232 has 144 divisors (see below), whose sum is σ = 1964371500. Its totient is φ = 220594176.

The previous prime is 670943213. The next prime is 670943239. The reversal of 670943232 is 232349076.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 666878976 + 4064256 = 25824^2 + 2016^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670943239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1640244 + ... + 1640652.

Almost surely, 2^670943232 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 670943232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (982185750).

670943232 is an abundant number, since it is smaller than the sum of its proper divisors (1293428268).

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

670943232 is a wasteful number, since it uses less digits than its factorization.

670943232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 670943232 is about 25902.5719186339. The cubic root of 670943232 is about 875.4444466454. Note that the first 5 decimals are identical.

The spelling of 670943232 in words is "six hundred seventy million, nine hundred forty-three thousand, two hundred thirty-two".