3894929920 has 80 divisors (see below), whose sum is σ = 10672852608. Its totient is φ = 1335398400.

The previous prime is 3894929893. The next prime is 3894929921. The reversal of 3894929920 is 299294983.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×3894929920² = 30340958163422412800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3894929921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90756 + ... + 126595.

Almost surely, 2^3894929920 is an apocalyptic number.

It is an amenable number.

3894929920 is an abundant number, since it is smaller than the sum of its proper divisors (6777922688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3894929920 is an equidigital number, since it uses as much as digits as its factorization.

3894929920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217381 (or 217365 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 55.

The square root of 3894929920 is about 62409.3736549246. The cubic root of 3894929920 is about 1573.3785170081.

The spelling of 3894929920 in words is "three billion, eight hundred ninety-four million, nine hundred twenty-nine thousand, nine hundred twenty".