397748509340 has 48 divisors (see below), whose sum is σ = 1028026921152. Its totient is φ = 125880846336.

The previous prime is 397748509297. The next prime is 397748509357. The reversal of 397748509340 is 43905847793.

It is a self number, because there is not a number n which added to its sum of digits gives 397748509340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109269749 + ... + 109273388.

It is an arithmetic number, because the mean of its divisors is an integer number (21417227524).

Almost surely, 2^397748509340 is an apocalyptic number.

It is an amenable number.

397748509340 is an abundant number, since it is smaller than the sum of its proper divisors (630278411812).

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

397748509340 is a wasteful number, since it uses less digits than its factorization.

397748509340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218543166 (or 218543164 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 59.

The spelling of 397748509340 in words is "three hundred ninety-seven billion, seven hundred forty-eight million, five hundred nine thousand, three hundred forty".