3864780 has 96 divisors (see below), whose sum is σ = 12761280. Its totient is φ = 967680.

The previous prime is 3864767. The next prime is 3864781. The reversal of 3864780 is 874683.

3864780 is a `hidden beast` number, since 3 + 8 + 647 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3864781) by changing a digit.

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, 8970 + ... + 9390.

It is an arithmetic number, because the mean of its divisors is an integer number (132930).

Almost surely, 2^3864780 is an apocalyptic number.

3864780 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 3864780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6380640).

3864780 is an abundant number, since it is smaller than the sum of its proper divisors (8896500).

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

3864780 is a wasteful number, since it uses less digits than its factorization.

3864780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 3864780 is about 1965.9043720385. The cubic root of 3864780 is about 156.9308254092.

The spelling of 3864780 in words is "three million, eight hundred sixty-four thousand, seven hundred eighty".