70856838 has 48 divisors (see below), whose sum is σ = 167469120. Its totient is φ = 21520512.

The previous prime is 70856837. The next prime is 70856843. The reversal of 70856838 is 83865807.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 70856793 and 70856802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70856837) 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, 16570 + ... + 20402.

It is an arithmetic number, because the mean of its divisors is an integer number (3488940).

Almost surely, 2^70856838 is an apocalyptic number.

70856838 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 70856838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83734560).

70856838 is an abundant number, since it is smaller than the sum of its proper divisors (96612282).

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

70856838 is a wasteful number, since it uses less digits than its factorization.

70856838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3933 (or 3930 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 70856838 is about 8417.6503847570. The cubic root of 70856838 is about 413.8032741739.

The spelling of 70856838 in words is "seventy million, eight hundred fifty-six thousand, eight hundred thirty-eight".