3872778 has 64 divisors (see below), whose sum is σ = 9821952. Its totient is φ = 990720.

The previous prime is 3872777. The next prime is 3872797. The reversal of 3872778 is 8772783.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an Ulam number.

It is a d-powerful number, because it can be written as 3⁷ + 8³ + 7⁶ + 2¹³ + 7⁷ + 7⁷ + 8⁷ .

It is not an unprimeable number, because it can be changed into a prime (3872773) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22300 + ... + 22472.

It is an arithmetic number, because the mean of its divisors is an integer number (153468).

Almost surely, 2^3872778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3872778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4910976).

3872778 is an abundant number, since it is smaller than the sum of its proper divisors (5949174).

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

3872778 is a wasteful number, since it uses less digits than its factorization.

3872778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239.

The product of its digits is 131712, while the sum is 42.

The square root of 3872778 is about 1967.9374990075. The cubic root of 3872778 is about 157.0390047382.

The spelling of 3872778 in words is "three million, eight hundred seventy-two thousand, seven hundred seventy-eight".