670531400 has 96 divisors (see below), whose sum is σ = 1943714880. Its totient is φ = 208992000.

The previous prime is 670531321. The next prime is 670531447. The reversal of 670531400 is 4135076.

It is a super-2 number, since 2×670531400² = 899224716771920000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 670531400.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6371 + ... + 37170.

It is an arithmetic number, because the mean of its divisors is an integer number (20247030).

Almost surely, 2^670531400 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 670531400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (971857440).

670531400 is an abundant number, since it is smaller than the sum of its proper divisors (1273183480).

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

670531400 is a wasteful number, since it uses less digits than its factorization.

670531400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43575 (or 43566 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 670531400 is about 25894.6210630702. The cubic root of 670531400 is about 875.2652909869.

Adding to 670531400 its reverse (4135076), we get a palindrome (674666476).

The spelling of 670531400 in words is "six hundred seventy million, five hundred thirty-one thousand, four hundred".