3081240 has 96 divisors (see below), whose sum is σ = 10417680. Its totient is φ = 819072.

The previous prime is 3081223. The next prime is 3081259. The reversal of 3081240 is 421803.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9562 + ... + 9878.

Almost surely, 2^3081240 is an apocalyptic number.

3081240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3081240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5208840).

3081240 is an abundant number, since it is smaller than the sum of its proper divisors (7336440).

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

3081240 is a wasteful number, since it uses less digits than its factorization.

3081240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 3081240 is about 1755.3461197154. The cubic root of 3081240 is about 145.5152497567.

It can be divided in two parts, 3081 and 240, that added together give a triangular number (3321 = T₈₁).

The spelling of 3081240 in words is "three million, eighty-one thousand, two hundred forty".