6421428404 has 48 divisors (see below), whose sum is σ = 11941278720. Its totient is φ = 3012992640.

The previous prime is 6421428401. The next prime is 6421428407. The reversal of 6421428404 is 4048241246.

It is an interprime number because it is at equal distance from previous prime (6421428401) and next prime (6421428407).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421428401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4020134 + ... + 4021730.

It is an arithmetic number, because the mean of its divisors is an integer number (248776640).

Almost surely, 2^6421428404 is an apocalyptic number.

It is an amenable number.

6421428404 is a deficient number, since it is larger than the sum of its proper divisors (5519850316).

6421428404 is a wasteful number, since it uses less digits than its factorization.

6421428404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088 (or 2086 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 35.

The square root of 6421428404 is about 80133.8156086430. The cubic root of 6421428404 is about 1858.7053468014.

The spelling of 6421428404 in words is "six billion, four hundred twenty-one million, four hundred twenty-eight thousand, four hundred four".