3907840 has 72 divisors (see below), whose sum is σ = 9713088. Its totient is φ = 1505280.

The previous prime is 3907831. The next prime is 3907847. The reversal of 3907840 is 487093.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3907847) 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, 55005 + ... + 55075.

It is an arithmetic number, because the mean of its divisors is an integer number (134904).

Almost surely, 2^3907840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3907840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4856544).

3907840 is an abundant number, since it is smaller than the sum of its proper divisors (5805248).

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

3907840 is an equidigital number, since it uses as much as digits as its factorization.

3907840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 3907840 is about 1976.8257383998. The cubic root of 3907840 is about 157.5114965993.

The spelling of 3907840 in words is "three million, nine hundred seven thousand, eight hundred forty".