31789485 has 72 divisors (see below), whose sum is σ = 69090840. Its totient is φ = 13402368.

The previous prime is 31789463. The next prime is 31789493. The reversal of 31789485 is 58498713.

It can be written as a sum of positive squares in 4 ways, for example, as 1285956 + 30503529 = 1134^2 + 5523^2 .

It is not a de Polignac number, because 31789485 - 2⁶ = 31789421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31789485.

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 71 ways as a sum of consecutive naturals, for example, 28111 + ... + 29219.

It is an arithmetic number, because the mean of its divisors is an integer number (959595).

Almost surely, 2^31789485 is an apocalyptic number.

31789485 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31789485 is an abundant number, since it is smaller than the sum of its proper divisors (37301355).

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

31789485 is a wasteful number, since it uses less digits than its factorization.

31789485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147 (or 1137 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 31789485 is about 5638.2164733185. The cubic root of 31789485 is about 316.7824870274.

The spelling of 31789485 in words is "thirty-one million, seven hundred eighty-nine thousand, four hundred eighty-five".