3081690 has 48 divisors (see below), whose sum is σ = 8117928. Its totient is φ = 811008.

The previous prime is 3081677. The next prime is 3081691. The reversal of 3081690 is 961803.

It can be written as a sum of positive squares in 4 ways, for example, as 2277081 + 804609 = 1509^2 + 897^2 .

It is a super-2 number, since 2×3081690² = 18993626512200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3081691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8554 + ... + 8906.

Almost surely, 2^3081690 is an apocalyptic number.

3081690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3081690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4058964).

3081690 is an abundant number, since it is smaller than the sum of its proper divisors (5036238).

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

3081690 is a wasteful number, since it uses less digits than its factorization.

3081690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 3081690 is about 1755.4742948844. The cubic root of 3081690 is about 145.5223333416.

The spelling of 3081690 in words is "three million, eighty-one thousand, six hundred ninety".