398757208484 has 6 divisors (see below), whose sum is σ = 697825114854. Its totient is φ = 199378604240.

The previous prime is 398757208483. The next prime is 398757208489. The reversal of 398757208484 is 484802757893.

It can be written as a sum of positive squares in only one way, i.e., 396081422500 + 2675785984 = 629350^2 + 51728^2 .

It is a super-2 number, since 2×398757208484² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 398757208484.

It is not an unprimeable number, because it can be changed into a prime (398757208483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49844651057 + ... + 49844651064.

It is an arithmetic number, because the mean of its divisors is an integer number (116304185809).

Almost surely, 2^398757208484 is an apocalyptic number.

It is an amenable number.

398757208484 is a deficient number, since it is larger than the sum of its proper divisors (299067906370).

398757208484 is a wasteful number, since it uses less digits than its factorization.

398757208484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99689302125 (or 99689302123 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 65.

The spelling of 398757208484 in words is "three hundred ninety-eight billion, seven hundred fifty-seven million, two hundred eight thousand, four hundred eighty-four".