398784741 has 16 divisors (see below), whose sum is σ = 555323904. Its totient is φ = 254071664.

The previous prime is 398784721. The next prime is 398784761. The reversal of 398784741 is 147487893.

It is an interprime number because it is at equal distance from previous prime (398784721) and next prime (398784761).

It is a cyclic number.

It is not a de Polignac number, because 398784741 - 2⁶ = 398784677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398784721) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 113290 + ... + 116756.

It is an arithmetic number, because the mean of its divisors is an integer number (34707744).

Almost surely, 2^398784741 is an apocalyptic number.

It is an amenable number.

398784741 is a deficient number, since it is larger than the sum of its proper divisors (156539163).

398784741 is a wasteful number, since it uses less digits than its factorization.

398784741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5160.

The product of its digits is 1354752, while the sum is 51.

The square root of 398784741 is about 19969.5954140288. The cubic root of 398784741 is about 736.0593673806.

The spelling of 398784741 in words is "three hundred ninety-eight million, seven hundred eighty-four thousand, seven hundred forty-one".