398996385 has 16 divisors (see below), whose sum is σ = 639026880. Its totient is φ = 212587200.

The previous prime is 398996383. The next prime is 398996401. The reversal of 398996385 is 583699893.

It is not a de Polignac number, because 398996385 - 2¹ = 398996383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398996383) 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, 3111 + ... + 28419.

It is an arithmetic number, because the mean of its divisors is an integer number (39939180).

Almost surely, 2^398996385 is an apocalyptic number.

It is an amenable number.

398996385 is a deficient number, since it is larger than the sum of its proper divisors (240030495).

398996385 is a wasteful number, since it uses less digits than its factorization.

398996385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26368.

The product of its digits is 12597120, while the sum is 60.

The square root of 398996385 is about 19974.8938670522. The cubic root of 398996385 is about 736.1895587526.

The spelling of 398996385 in words is "three hundred ninety-eight million, nine hundred ninety-six thousand, three hundred eighty-five".