3878929 has 4 divisors (see below), whose sum is σ = 3942580. Its totient is φ = 3815280.

The previous prime is 3878923. The next prime is 3878947. The reversal of 3878929 is 9298783.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1782225 + 2096704 = 1335^2 + 1448^2 .

It is a cyclic number.

It is not a de Polignac number, because 3878929 - 2³ = 3878921 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3878921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31734 + ... + 31855.

It is an arithmetic number, because the mean of its divisors is an integer number (985645).

Almost surely, 2^3878929 is an apocalyptic number.

It is an amenable number.

3878929 is a deficient number, since it is larger than the sum of its proper divisors (63651).

3878929 is an equidigital number, since it uses as much as digits as its factorization.

3878929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63650.

The product of its digits is 217728, while the sum is 46.

The square root of 3878929 is about 1969.4996826605. The cubic root of 3878929 is about 157.1221006430.

It can be divided in two parts, 387 and 8929, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 3878929 in words is "three million, eight hundred seventy-eight thousand, nine hundred twenty-nine".