3146640 has 80 divisors (see below), whose sum is σ = 11154048. Its totient is φ = 718848.

The previous prime is 3146639. The next prime is 3146651. The reversal of 3146640 is 466413.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 3146640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 744 + ... + 2616.

Almost surely, 2^3146640 is an apocalyptic number.

3146640 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 3146640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5577024).

3146640 is an abundant number, since it is smaller than the sum of its proper divisors (8007408).

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

3146640 is a wasteful number, since it uses less digits than its factorization.

3146640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896 (or 1890 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 3146640 is about 1773.8771096105. The cubic root of 3146640 is about 146.5375815553.

The spelling of 3146640 in words is "three million, one hundred forty-six thousand, six hundred forty".