3894240 has 192 divisors, whose sum is σ = 14999040. Its totient is φ = 829440.

The previous prime is 3894239. The next prime is 3894269. The reversal of 3894240 is 424983.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 3894198 and 3894207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63810 + ... + 63870.

It is an arithmetic number, because the mean of its divisors is an integer number (78120).

Almost surely, 2^3894240 is an apocalyptic number.

3894240 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 3894240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7499520).

3894240 is an abundant number, since it is smaller than the sum of its proper divisors (11104800).

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

3894240 is a wasteful number, since it uses less digits than its factorization.

3894240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 3894240 is about 1973.3828822608. The cubic root of 3894240 is about 157.3285612520.

The spelling of 3894240 in words is "three million, eight hundred ninety-four thousand, two hundred forty".