70509840 has 40 divisors (see below), whose sum is σ = 218581248. Its totient is φ = 18802560.

The previous prime is 70509821. The next prime is 70509847. The reversal of 70509840 is 4890507.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (70509847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146656 + ... + 147135.

Almost surely, 2^70509840 is an apocalyptic number.

It is an amenable number.

70509840 is an abundant number, since it is smaller than the sum of its proper divisors (148071408).

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

70509840 is a wasteful number, since it uses less digits than its factorization.

70509840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293807 (or 293801 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 70509840 is about 8397.0137549012. The cubic root of 70509840 is about 413.1266801405.

The spelling of 70509840 in words is "seventy million, five hundred nine thousand, eight hundred forty".