3261840 has 40 divisors (see below), whose sum is σ = 10112448. Its totient is φ = 869760.

The previous prime is 3261829. The next prime is 3261857. The reversal of 3261840 is 481623.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

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 3261840.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6556 + ... + 7035.

Almost surely, 2^3261840 is an apocalyptic number.

3261840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3261840 is an abundant number, since it is smaller than the sum of its proper divisors (6850608).

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

3261840 is a wasteful number, since it uses less digits than its factorization.

3261840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13607 (or 13601 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 3261840 is about 1806.0564775222. The cubic root of 3261840 is about 148.3044621109.

The spelling of 3261840 in words is "three million, two hundred sixty-one thousand, eight hundred forty".