70839984 has 20 divisors (see below), whose sum is σ = 183003416. Its totient is φ = 23613312.

The previous prime is 70839983. The next prime is 70840009. The reversal of 70839984 is 48993807.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 1475833 = 70839984 / (7 + 0 + 8 + 3 + 9 + 9 + 8 + 4).

It is not an unprimeable number, because it can be changed into a prime (70839983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737869 + ... + 737964.

Almost surely, 2^70839984 is an apocalyptic number.

It is an amenable number.

70839984 is an abundant number, since it is smaller than the sum of its proper divisors (112163432).

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

70839984 is a wasteful number, since it uses less digits than its factorization.

70839984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475844 (or 1475838 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 70839984 is about 8416.6492145034. The cubic root of 70839984 is about 413.7704625045.

The spelling of 70839984 in words is "seventy million, eight hundred thirty-nine thousand, nine hundred eighty-four".