3894729405 has 32 divisors (see below), whose sum is σ = 7145048064. Its totient is φ = 1774633536.

The previous prime is 3894729379. The next prime is 3894729437. The reversal of 3894729405 is 5049274983.

It is not a de Polignac number, because 3894729405 - 2⁶ = 3894729341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28177 + ... + 92646.

It is an arithmetic number, because the mean of its divisors is an integer number (223282752).

Almost surely, 2^3894729405 is an apocalyptic number.

3894729405 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3894729405 is a deficient number, since it is larger than the sum of its proper divisors (3250318659).

3894729405 is a wasteful number, since it uses less digits than its factorization.

3894729405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121145.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The square root of 3894729405 is about 62407.7671848625. The cubic root of 3894729405 is about 1573.3515168298.

The spelling of 3894729405 in words is "three billion, eight hundred ninety-four million, seven hundred twenty-nine thousand, four hundred five".