6397509428 has 24 divisors (see below), whose sum is σ = 12004272000. Its totient is φ = 2972481408.

The previous prime is 6397509407. The next prime is 6397509467. The reversal of 6397509428 is 8249057936.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6397509428.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590078 + ... + 600821.

It is an arithmetic number, because the mean of its divisors is an integer number (500178000).

Almost surely, 2^6397509428 is an apocalyptic number.

6397509428 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6397509428 is a deficient number, since it is larger than the sum of its proper divisors (5606762572).

6397509428 is a wasteful number, since it uses less digits than its factorization.

6397509428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190999 (or 1190997 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 53.

The square root of 6397509428 is about 79984.4324103134. The cubic root of 6397509428 is about 1856.3946644645.

The spelling of 6397509428 in words is "six billion, three hundred ninety-seven million, five hundred nine thousand, four hundred twenty-eight".