3890401988 has 12 divisors (see below), whose sum is σ = 7427131152. Its totient is φ = 1768364520.

The previous prime is 3890401969. The next prime is 3890401993. The reversal of 3890401988 is 8891040983.

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 3 ways as a sum of consecutive naturals, for example, 44209070 + ... + 44209157.

It is an arithmetic number, because the mean of its divisors is an integer number (618927596).

Almost surely, 2^3890401988 is an apocalyptic number.

It is an amenable number.

3890401988 is a deficient number, since it is larger than the sum of its proper divisors (3536729164).

3890401988 is a wasteful number, since it uses less digits than its factorization.

3890401988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88418242 (or 88418240 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 3890401988 is about 62373.0870488226. The cubic root of 3890401988 is about 1572.7685861903.

The spelling of 3890401988 in words is "three billion, eight hundred ninety million, four hundred one thousand, nine hundred eighty-eight".