398756708 has 48 divisors (see below), whose sum is σ = 816816000. Its totient is φ = 170261280.

The previous prime is 398756707. The next prime is 398756719. The reversal of 398756708 is 807657893.

It is a self number, because there is not a number n which added to its sum of digits gives 398756708.

It is not an unprimeable number, because it can be changed into a prime (398756707) 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, 698063 + ... + 698633.

It is an arithmetic number, because the mean of its divisors is an integer number (17017000).

Almost surely, 2^398756708 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398756708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (408408000).

398756708 is an abundant number, since it is smaller than the sum of its proper divisors (418059292).

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

398756708 is a wasteful number, since it uses less digits than its factorization.

398756708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 1089 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 53.

The square root of 398756708 is about 19968.8935096565. The cubic root of 398756708 is about 736.0421196162.

The spelling of 398756708 in words is "three hundred ninety-eight million, seven hundred fifty-six thousand, seven hundred eight".