398971760 has 40 divisors (see below), whose sum is σ = 1011939696. Its totient is φ = 145080320.

The previous prime is 398971751. The next prime is 398971799. The reversal of 398971760 is 67179893.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 398971699 and 398971708.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225809 + ... + 227568.

Almost surely, 2^398971760 is an apocalyptic number.

It is an amenable number.

398971760 is an abundant number, since it is smaller than the sum of its proper divisors (612967936).

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

398971760 is a wasteful number, since it uses less digits than its factorization.

398971760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453401 (or 453395 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 398971760 is about 19974.2774587718. The cubic root of 398971760 is about 736.1744132179.

The spelling of 398971760 in words is "three hundred ninety-eight million, nine hundred seventy-one thousand, seven hundred sixty".