398993536 has 32 divisors (see below), whose sum is σ = 841631580. Its totient is φ = 187760640.

The previous prime is 398993503. The next prime is 398993537. The reversal of 398993536 is 635399893.

It can be written as a sum of positive squares in 2 ways, for example, as 395214400 + 3779136 = 19880^2 + 1944^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (398993537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89505 + ... + 93856.

Almost surely, 2^398993536 is an apocalyptic number.

It is an amenable number.

398993536 is an abundant number, since it is smaller than the sum of its proper divisors (442638044).

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

398993536 is a wasteful number, since it uses less digits than its factorization.

398993536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183392 (or 183380 counting only the distinct ones).

The product of its digits is 4723920, while the sum is 55.

The square root of 398993536 is about 19974.8225524033. The cubic root of 398993536 is about 736.1878065153.

The spelling of 398993536 in words is "three hundred ninety-eight million, nine hundred ninety-three thousand, five hundred thirty-six".