3139478 has 8 divisors (see below), whose sum is σ = 4775760. Its totient is φ = 1547560.

The previous prime is 3139471. The next prime is 3139483. The reversal of 3139478 is 8749313.

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

It is a super-2 number, since 2×3139478² = 19712644224968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3139471) 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, 10913 + ... + 11196.

It is an arithmetic number, because the mean of its divisors is an integer number (596970).

Almost surely, 2^3139478 is an apocalyptic number.

3139478 is a deficient number, since it is larger than the sum of its proper divisors (1636282).

3139478 is a wasteful number, since it uses less digits than its factorization.

3139478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22182.

The product of its digits is 18144, while the sum is 35.

The square root of 3139478 is about 1771.8572177238. The cubic root of 3139478 is about 146.4263200810.

The spelling of 3139478 in words is "three million, one hundred thirty-nine thousand, four hundred seventy-eight".