3149878 has 4 divisors (see below), whose sum is σ = 4724820. Its totient is φ = 1574938.

The previous prime is 3149851. The next prime is 3149897. The reversal of 3149878 is 8789413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8789413 = 193 ⋅45541.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 3149878.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 787468 + ... + 787471.

It is an arithmetic number, because the mean of its divisors is an integer number (1181205).

Almost surely, 2^3149878 is an apocalyptic number.

3149878 is a deficient number, since it is larger than the sum of its proper divisors (1574942).

3149878 is a wasteful number, since it uses less digits than its factorization.

3149878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574941.

The product of its digits is 48384, while the sum is 40.

The square root of 3149878 is about 1774.7895649907. The cubic root of 3149878 is about 146.5878283823.

The spelling of 3149878 in words is "three million, one hundred forty-nine thousand, eight hundred seventy-eight".