3919885905428 has 12 divisors (see below), whose sum is σ = 6879455925300. Its totient is φ = 1954327069632.

The previous prime is 3919885905349. The next prime is 3919885905431. The reversal of 3919885905428 is 8245095889193.

It can be written as a sum of positive squares in 2 ways, for example, as 2454304490884 + 1465581414544 = 1566622^2 + 1210612^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1403969201 + ... + 1403971992.

It is an arithmetic number, because the mean of its divisors is an integer number (573287993775).

Almost surely, 2^{3919885905428} is an apocalyptic number.

It is an amenable number.

3919885905428 is a deficient number, since it is larger than the sum of its proper divisors (2959570019872).

3919885905428 is a wasteful number, since it uses less digits than its factorization.

3919885905428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807941546 (or 2807941544 counting only the distinct ones).

The product of its (nonzero) digits is 223948800, while the sum is 71.

The spelling of 3919885905428 in words is "three trillion, nine hundred nineteen billion, eight hundred eighty-five million, nine hundred five thousand, four hundred twenty-eight".