70531686 has 24 divisors (see below), whose sum is σ = 160862520. Its totient is φ = 22273056.

The previous prime is 70531673. The next prime is 70531687. The reversal of 70531686 is 68613507.

It is a self number, because there is not a number n which added to its sum of digits gives 70531686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70531687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102775 + ... + 103458.

It is an arithmetic number, because the mean of its divisors is an integer number (6702605).

Almost surely, 2^70531686 is an apocalyptic number.

70531686 is an abundant number, since it is smaller than the sum of its proper divisors (90330834).

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

70531686 is a wasteful number, since it uses less digits than its factorization.

70531686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206260 (or 206257 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 70531686 is about 8398.3144737501. The cubic root of 70531686 is about 413.1693419569.

It can be divided in two parts, 70531 and 686, that added together give a palindrome (71217).

The spelling of 70531686 in words is "seventy million, five hundred thirty-one thousand, six hundred eighty-six".