670389450 has 48 divisors (see below), whose sum is σ = 1677321216. Its totient is φ = 177184000.

The previous prime is 670389443. The next prime is 670389457. The reversal of 670389450 is 54983076.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (670389443) and next prime (670389457).

It is a super-3 number, since 3×670389450³ (a number of 27 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (670389457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2826 + ... + 36725.

It is an arithmetic number, because the mean of its divisors is an integer number (34944192).

Almost surely, 2^670389450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670389450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (838660608).

670389450 is an abundant number, since it is smaller than the sum of its proper divisors (1006931766).

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

670389450 is a wasteful number, since it uses less digits than its factorization.

670389450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39679 (or 39674 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 670389450 is about 25891.8800012668. The cubic root of 670389450 is about 875.2035227255.

The spelling of 670389450 in words is "six hundred seventy million, three hundred eighty-nine thousand, four hundred fifty".