331486785 has 48 divisors (see below), whose sum is σ = 671958144. Its totient is φ = 148006656.

The previous prime is 331486781. The next prime is 331486829. The reversal of 331486785 is 587684133.

It is not a de Polignac number, because 331486785 - 2² = 331486781 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 331486785.

It is not an unprimeable number, because it can be changed into a prime (331486781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1309 + ... + 25781.

It is an arithmetic number, because the mean of its divisors is an integer number (13999128).

Almost surely, 2^331486785 is an apocalyptic number.

331486785 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

331486785 is an abundant number, since it is smaller than the sum of its proper divisors (340471359).

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

331486785 is a wasteful number, since it uses less digits than its factorization.

331486785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24534 (or 24531 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 331486785 is about 18206.7785453660. The cubic root of 331486785 is about 692.0785777600.

The spelling of 331486785 in words is "three hundred thirty-one million, four hundred eighty-six thousand, seven hundred eighty-five".