670543540 has 48 divisors (see below), whose sum is σ = 1427774544. Its totient is φ = 264499200.

The previous prime is 670543519. The next prime is 670543553. The reversal of 670543540 is 45345076.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 196784784 + 473758756 = 14028^2 + 21766^2 .

It is a junction number, because it is equal to n+sod(n) for n = 670543496 and 670543505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 816330 + ... + 817150.

It is an arithmetic number, because the mean of its divisors is an integer number (29745303).

Almost surely, 2^670543540 is an apocalyptic number.

It is an amenable number.

670543540 is an abundant number, since it is smaller than the sum of its proper divisors (757231004).

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

670543540 is a wasteful number, since it uses less digits than its factorization.

670543540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 670543540 is about 25894.8554736264. The cubic root of 670543540 is about 875.2705731937.

The spelling of 670543540 in words is "six hundred seventy million, five hundred forty-three thousand, five hundred forty".