70039439 has 24 divisors (see below), whose sum is σ = 79839648. Its totient is φ = 61276160.

The previous prime is 70039433. The next prime is 70039451. The reversal of 70039439 is 93493007.

It is not a de Polignac number, because 70039439 - 2⁴ = 70039423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70039399 and 70039408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70039433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 272399 + ... + 272655.

It is an arithmetic number, because the mean of its divisors is an integer number (3326652).

Almost surely, 2^70039439 is an apocalyptic number.

70039439 is a deficient number, since it is larger than the sum of its proper divisors (9800209).

70039439 is a wasteful number, since it uses less digits than its factorization.

70039439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 70039439 is about 8368.9568645083. The cubic root of 70039439 is about 412.2059151498.

The spelling of 70039439 in words is "seventy million, thirty-nine thousand, four hundred thirty-nine".