3894402939015 has 32 divisors (see below), whose sum is σ = 6234176678400. Its totient is φ = 2075971234176.

The previous prime is 3894402939013. The next prime is 3894402939043. The reversal of 3894402939015 is 5109392044983.

It is not a de Polignac number, because 3894402939015 - 2¹ = 3894402939013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3894402939013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 416553561 + ... + 416562909.

It is an arithmetic number, because the mean of its divisors is an integer number (194818021200).

Almost surely, 2^{3894402939015} is an apocalyptic number.

3894402939015 is a deficient number, since it is larger than the sum of its proper divisors (2339773739385).

3894402939015 is a wasteful number, since it uses less digits than its factorization.

3894402939015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20343.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 3894402939015 in words is "three trillion, eight hundred ninety-four billion, four hundred two million, nine hundred thirty-nine thousand, fifteen".