3947434 has 8 divisors (see below), whose sum is σ = 6269508. Its totient is φ = 1857600.

The previous prime is 3947431. The next prime is 3947453. The reversal of 3947434 is 4347493.

It can be written as a sum of positive squares in 2 ways, for example, as 3814209 + 133225 = 1953^2 + 365^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 116101 = 3947434 / (3 + 9 + 4 + 7 + 4 + 3 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 3947434.

It is not an unprimeable number, because it can be changed into a prime (3947431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58017 + ... + 58084.

Almost surely, 2^3947434 is an apocalyptic number.

3947434 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

3947434 is a deficient number, since it is larger than the sum of its proper divisors (2322074).

3947434 is a wasteful number, since it uses less digits than its factorization.

3947434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116120.

The product of its digits is 36288, while the sum is 34.

The square root of 3947434 is about 1986.8150392022. The cubic root of 3947434 is about 158.0416757017.

It can be divided in two parts, 39 and 47434, that multiplied together give a triangular number (1849926 = T₁₉₂₃).

The spelling of 3947434 in words is "three million, nine hundred forty-seven thousand, four hundred thirty-four".