670864040 has 128 divisors (see below), whose sum is σ = 1896652800. Its totient is φ = 207463680.

The previous prime is 670864039. The next prime is 670864049. The reversal of 670864040 is 40468076.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (670864049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 427337 + ... + 428903.

It is an arithmetic number, because the mean of its divisors is an integer number (14817600).

Almost surely, 2^670864040 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 670864040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948326400).

670864040 is an abundant number, since it is smaller than the sum of its proper divisors (1225788760).

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

670864040 is a wasteful number, since it uses less digits than its factorization.

670864040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735 (or 1731 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 670864040 is about 25901.0432222333. The cubic root of 670864040 is about 875.4100021394.

The spelling of 670864040 in words is "six hundred seventy million, eight hundred sixty-four thousand, forty".