731686536 has 48 divisors (see below), whose sum is σ = 2264745600. Its totient is φ = 209053152.

The previous prime is 731686531. The next prime is 731686541. The reversal of 731686536 is 635686137.

731686536 is a `hidden beast` number, since 7 + 31 + 6 + 86 + 536 = 666.

It is an interprime number because it is at equal distance from previous prime (731686531) and next prime (731686541).

It is a super-3 number, since 3×731686536³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 731686491 and 731686500.

It is not an unprimeable number, because it can be changed into a prime (731686531) 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, 725376 + ... + 726383.

It is an arithmetic number, because the mean of its divisors is an integer number (47182200).

Almost surely, 2^731686536 is an apocalyptic number.

It is an amenable number.

731686536 is an abundant number, since it is smaller than the sum of its proper divisors (1533059064).

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

731686536 is a wasteful number, since it uses less digits than its factorization.

731686536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451778 (or 1451771 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 731686536 is about 27049.7049152112. The cubic root of 731686536 is about 901.1042150487.

The spelling of 731686536 in words is "seven hundred thirty-one million, six hundred eighty-six thousand, five hundred thirty-six".