3878652420 has 72 divisors (see below), whose sum is σ = 12144787200. Its totient is φ = 1000941120.

The previous prime is 3878652409. The next prime is 3878652431. The reversal of 3878652420 is 242568783.

3878652420 is a `hidden beast` number, since 38 + 78 + 6 + 524 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (3878652409) and next prime (3878652431).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 341970 + ... + 353129.

It is an arithmetic number, because the mean of its divisors is an integer number (168677600).

Almost surely, 2^3878652420 is an apocalyptic number.

3878652420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3878652420 is an abundant number, since it is smaller than the sum of its proper divisors (8266134780).

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

3878652420 is a wasteful number, since it uses less digits than its factorization.

3878652420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695145 (or 695140 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 3878652420 is about 62278.8280236550. The cubic root of 3878652420 is about 1571.1836611868.

The spelling of 3878652420 in words is "three billion, eight hundred seventy-eight million, six hundred fifty-two thousand, four hundred twenty".