670447040 has 56 divisors (see below), whose sum is σ = 1608094320. Its totient is φ = 266231808.

The previous prime is 670447021. The next prime is 670447061. The reversal of 670447040 is 40744076.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 670446988 and 670447006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36944 + ... + 52016.

It is an arithmetic number, because the mean of its divisors is an integer number (28715970).

Almost surely, 2^670447040 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 670447040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804047160).

670447040 is an abundant number, since it is smaller than the sum of its proper divisors (937647280).

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

670447040 is a wasteful number, since it uses less digits than its factorization.

670447040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15229 (or 15219 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 670447040 is about 25892.9921021113. The cubic root of 670447040 is about 875.2285835453.

The spelling of 670447040 in words is "six hundred seventy million, four hundred forty-seven thousand, forty".