398427889425 has 48 divisors (see below), whose sum is σ = 670242816000. Its totient is φ = 208786089280.

The previous prime is 398427889417. The next prime is 398427889427. The reversal of 398427889425 is 524988724893.

It is not a de Polignac number, because 398427889425 - 2³ = 398427889417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398427889425.

It is not an unprimeable number, because it can be changed into a prime (398427889427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9000496 + ... + 9044654.

It is an arithmetic number, because the mean of its divisors is an integer number (13963392000).

Almost surely, 2^398427889425 is an apocalyptic number.

It is an amenable number.

398427889425 is a deficient number, since it is larger than the sum of its proper divisors (271814926575).

398427889425 is a wasteful number, since it uses less digits than its factorization.

398427889425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46270 (or 46265 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 69.

The spelling of 398427889425 in words is "three hundred ninety-eight billion, four hundred twenty-seven million, eight hundred eighty-nine thousand, four hundred twenty-five".