397748509536 has 96 divisors (see below), whose sum is σ = 1195857492480. Its totient is φ = 113393673216.

The previous prime is 397748509531. The next prime is 397748509589. The reversal of 397748509536 is 635905847793.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397748509531) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 340476 + ... + 954683.

It is an arithmetic number, because the mean of its divisors is an integer number (12456848880).

Almost surely, 2^397748509536 is an apocalyptic number.

It is an amenable number.

397748509536 is an abundant number, since it is smaller than the sum of its proper divisors (798108982944).

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

397748509536 is a wasteful number, since it uses less digits than its factorization.

397748509536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295636 (or 1295628 counting only the distinct ones).

The product of its (nonzero) digits is 171460800, while the sum is 66.

The spelling of 397748509536 in words is "three hundred ninety-seven billion, seven hundred forty-eight million, five hundred nine thousand, five hundred thirty-six".