3867920 has 40 divisors (see below), whose sum is σ = 10279104. Its totient is φ = 1325952.

The previous prime is 3867911. The next prime is 3867923. The reversal of 3867920 is 297683.

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 (35).

It is not an unprimeable number, because it can be changed into a prime (3867923) 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, 2894 + ... + 4013.

Almost surely, 2^3867920 is an apocalyptic number.

It is an amenable number.

3867920 is an abundant number, since it is smaller than the sum of its proper divisors (6411184).

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

3867920 is a wasteful number, since it uses less digits than its factorization.

3867920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6927 (or 6921 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 3867920 is about 1966.7028245264. The cubic root of 3867920 is about 156.9733141927.

The spelling of 3867920 in words is "three million, eight hundred sixty-seven thousand, nine hundred twenty".