70831956 has 72 divisors (see below), whose sum is σ = 182619360. Its totient is φ = 21350784.

The previous prime is 70831939. The next prime is 70831991. The reversal of 70831956 is 65913807.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 107155 + ... + 107813.

It is an arithmetic number, because the mean of its divisors is an integer number (2536380).

Almost surely, 2^70831956 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 70831956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91309680).

70831956 is an abundant number, since it is smaller than the sum of its proper divisors (111787404).

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

70831956 is a wasteful number, since it uses less digits than its factorization.

70831956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 70831956 is about 8416.1722891110. The cubic root of 70831956 is about 413.7548316203.

The spelling of 70831956 in words is "seventy million, eight hundred thirty-one thousand, nine hundred fifty-six".