3878642 has 8 divisors (see below), whose sum is σ = 5878236. Its totient is φ = 1919232.

The previous prime is 3878629. The next prime is 3878647. The reversal of 3878642 is 2468783.

It can be written as a sum of positive squares in 2 ways, for example, as 3876961 + 1681 = 1969^2 + 41^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 3878596 and 3878605.

It is not an unprimeable number, because it can be changed into a prime (3878647) 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, 9803 + ... + 10190.

Almost surely, 2^3878642 is an apocalyptic number.

3878642 is a deficient number, since it is larger than the sum of its proper divisors (1999594).

3878642 is a wasteful number, since it uses less digits than its factorization.

3878642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20092.

The product of its digits is 64512, while the sum is 38.

The square root of 3878642 is about 1969.4268201688. The cubic root of 3878642 is about 157.1182254191.

The spelling of 3878642 in words is "three million, eight hundred seventy-eight thousand, six hundred forty-two".