70139712 has 56 divisors (see below), whose sum is σ = 186244992. Its totient is φ = 23296000.

The previous prime is 70139689. The next prime is 70139717. The reversal of 70139712 is 21793107.

It is a self number, because there is not a number n which added to its sum of digits gives 70139712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70139717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76537 + ... + 77447.

Almost surely, 2^70139712 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 70139712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93122496).

70139712 is an abundant number, since it is smaller than the sum of its proper divisors (116105280).

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

70139712 is a wasteful number, since it uses less digits than its factorization.

70139712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327 (or 1317 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 30.

The square root of 70139712 is about 8374.9454923599. The cubic root of 70139712 is about 412.4025349159.

The spelling of 70139712 in words is "seventy million, one hundred thirty-nine thousand, seven hundred twelve".