398785757740 has 48 divisors (see below), whose sum is σ = 854131975200. Its totient is φ = 156343016960.

The previous prime is 398785757737. The next prime is 398785757743. The reversal of 398785757740 is 47757587893.

It is an interprime number because it is at equal distance from previous prime (398785757737) and next prime (398785757743).

It is a self number, because there is not a number n which added to its sum of digits gives 398785757740.

It is not an unprimeable number, because it can be changed into a prime (398785757743) 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, 835536 + ... + 1222984.

It is an arithmetic number, because the mean of its divisors is an integer number (17794416150).

Almost surely, 2^398785757740 is an apocalyptic number.

It is an amenable number.

398785757740 is an abundant number, since it is smaller than the sum of its proper divisors (455346217460).

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

398785757740 is a wasteful number, since it uses less digits than its factorization.

398785757740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388482 (or 388480 counting only the distinct ones).

The product of its (nonzero) digits is 414892800, while the sum is 70.

The spelling of 398785757740 in words is "three hundred ninety-eight billion, seven hundred eighty-five million, seven hundred fifty-seven thousand, seven hundred forty".