670535420 has 48 divisors (see below), whose sum is σ = 1508982048. Its totient is φ = 249384960.

The previous prime is 670535381. The next prime is 670535429. The reversal of 670535420 is 24535076.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670535429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16340 + ... + 40100.

It is an arithmetic number, because the mean of its divisors is an integer number (31437126).

Almost surely, 2^670535420 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 670535420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (754491024).

670535420 is an abundant number, since it is smaller than the sum of its proper divisors (838446628).

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

670535420 is a wasteful number, since it uses less digits than its factorization.

670535420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23870 (or 23868 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 670535420 is about 25894.6986852522. The cubic root of 670535420 is about 875.2670401267.

The spelling of 670535420 in words is "six hundred seventy million, five hundred thirty-five thousand, four hundred twenty".