3878424729 has 9 divisors (see below), whose sum is σ = 5602438933. Its totient is φ = 2585491932.

The previous prime is 3878424721. The next prime is 3878424731. The reversal of 3878424729 is 9274248783.

It is a happy number.

The square root of 3878424729 is 62277.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 3878424729 - 2³ = 3878424721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3878424721) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 176452 + ... + 197210.

Almost surely, 2^3878424729 is an apocalyptic number.

3878424729 is the 62277-th square number.

3878424729 is the 31139-th centered octagonal number.

It is an amenable number.

3878424729 is a deficient number, since it is larger than the sum of its proper divisors (1724014204).

3878424729 is an frugal number, since it uses more digits than its factorization.

3878424729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41524 (or 20762 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The cubic root of 3878424729 is about 1571.1529158539.

The spelling of 3878424729 in words is "three billion, eight hundred seventy-eight million, four hundred twenty-four thousand, seven hundred twenty-nine".