3873840 has 40 divisors (see below), whose sum is σ = 12009648. Its totient is φ = 1032960.

The previous prime is 3873839. The next prime is 3873847. The reversal of 3873840 is 483783.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3873847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7831 + ... + 8310.

Almost surely, 2^3873840 is an apocalyptic number.

3873840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3873840 is an abundant number, since it is smaller than the sum of its proper divisors (8135808).

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

3873840 is a wasteful number, since it uses less digits than its factorization.

3873840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16157 (or 16151 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 3873840 is about 1968.2073061545. The cubic root of 3873840 is about 157.0533579304.

The spelling of 3873840 in words is "three million, eight hundred seventy-three thousand, eight hundred forty".