6390406500 has 48 divisors (see below), whose sum is σ = 18608868096. Its totient is φ = 1704108000.

The previous prime is 6390406481. The next prime is 6390406501. The reversal of 6390406500 is 56040936.

It is a happy number.

It is a super-3 number, since 3×6390406500³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (6390406501) 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, 2128636 + ... + 2131635.

It is an arithmetic number, because the mean of its divisors is an integer number (387684752).

Almost surely, 2^6390406500 is an apocalyptic number.

6390406500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6390406500 is an abundant number, since it is smaller than the sum of its proper divisors (12218461596).

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

6390406500 is a wasteful number, since it uses less digits than its factorization.

6390406500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260293 (or 4260281 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 6390406500 is about 79940.0181386019. The cubic root of 6390406500 is about 1855.7073803099.

The spelling of 6390406500 in words is "six billion, three hundred ninety million, four hundred six thousand, five hundred".