70856389 has 8 divisors (see below), whose sum is σ = 73874592. Its totient is φ = 67900560.

The previous prime is 70856381. The next prime is 70856413. The reversal of 70856389 is 98365807.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70856389 - 2³ = 70856381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70856381) 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 7 ways as a sum of consecutive naturals, for example, 13267 + ... + 17824.

It is an arithmetic number, because the mean of its divisors is an integer number (9234324).

Almost surely, 2^70856389 is an apocalyptic number.

It is an amenable number.

70856389 is a deficient number, since it is larger than the sum of its proper divisors (3018203).

70856389 is a wasteful number, since it uses less digits than its factorization.

70856389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31187.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 70856389 is about 8417.6237145646. The cubic root of 70856389 is about 413.8024001201.

The spelling of 70856389 in words is "seventy million, eight hundred fifty-six thousand, three hundred eighty-nine".