3878493 has 4 divisors (see below), whose sum is σ = 5171328. Its totient is φ = 2585660.

The previous prime is 3878491. The next prime is 3878519. The reversal of 3878493 is 3948783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3948783 = 3 ⋅1316261.

It is a cyclic number.

It is not a de Polignac number, because 3878493 - 2¹ = 3878491 is a prime.

It is a D-number.

3878493 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878491) 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, 646413 + ... + 646418.

It is an arithmetic number, because the mean of its divisors is an integer number (1292832).

Almost surely, 2^3878493 is an apocalyptic number.

It is an amenable number.

3878493 is a deficient number, since it is larger than the sum of its proper divisors (1292835).

3878493 is a wasteful number, since it uses less digits than its factorization.

3878493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292834.

The product of its digits is 145152, while the sum is 42.

The square root of 3878493 is about 1969.3889915403. The cubic root of 3878493 is about 157.1162134678.

It can be divided in two parts, 3878 and 493, that added together give a triangular number (4371 = T₉₃).

The spelling of 3878493 in words is "three million, eight hundred seventy-eight thousand, four hundred ninety-three".