3081636 has 18 divisors (see below), whose sum is σ = 7789782. Its totient is φ = 1027200.

The previous prime is 3081599. The next prime is 3081643. The reversal of 3081636 is 6361803.

It can be written as a sum of positive squares in only one way, i.e., 2528100 + 553536 = 1590^2 + 744^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42765 + ... + 42836.

Almost surely, 2^3081636 is an apocalyptic number.

3081636 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3081636 is an abundant number, since it is smaller than the sum of its proper divisors (4708146).

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

3081636 is a wasteful number, since it uses less digits than its factorization.

3081636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85611 (or 85606 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 3081636 is about 1755.4589143583. The cubic root of 3081636 is about 145.5214833478.

The spelling of 3081636 in words is "three million, eighty-one thousand, six hundred thirty-six".