326731287 has 8 divisors (see below), whose sum is σ = 438417136. Its totient is φ = 216433152.

The previous prime is 326731259. The next prime is 326731297. The reversal of 326731287 is 782137623.

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

It is not a de Polignac number, because 326731287 - 2¹⁶ = 326665751 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 (326731217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346378 + ... + 347319.

It is an arithmetic number, because the mean of its divisors is an integer number (54802142).

Almost surely, 2^326731287 is an apocalyptic number.

326731287 is a deficient number, since it is larger than the sum of its proper divisors (111685849).

326731287 is a wasteful number, since it uses less digits than its factorization.

326731287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693857.

The product of its digits is 84672, while the sum is 39.

The square root of 326731287 is about 18075.7098615794. The cubic root of 326731287 is about 688.7531125470.

The spelling of 326731287 in words is "three hundred twenty-six million, seven hundred thirty-one thousand, two hundred eighty-seven".