3900000428 has 12 divisors (see below), whose sum is σ = 7121740080. Its totient is φ = 1865217552.

The previous prime is 3900000427. The next prime is 3900000457. The reversal of 3900000428 is 8240000093.

It is a junction number, because it is equal to n+sod(n) for n = 3900000397 and 3900000406.

It is not an unprimeable number, because it can be changed into a prime (3900000427) 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, 21195563 + ... + 21195746.

It is an arithmetic number, because the mean of its divisors is an integer number (593478340).

Almost surely, 2^3900000428 is an apocalyptic number.

It is an amenable number.

3900000428 is a deficient number, since it is larger than the sum of its proper divisors (3221739652).

3900000428 is a wasteful number, since it uses less digits than its factorization.

3900000428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42391336 (or 42391334 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 3900000428 is about 62449.9834107264. The cubic root of 3900000428 is about 1574.0609742125.

The spelling of 3900000428 in words is "three billion, nine hundred million, four hundred twenty-eight", and thus it is an aban number.