398694305 has 16 divisors (see below), whose sum is σ = 503915904. Its totient is φ = 302227200.

The previous prime is 398694301. The next prime is 398694343. The reversal of 398694305 is 503496893.

It is not a de Polignac number, because 398694305 - 2² = 398694301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398694305.

It is not an unprimeable number, because it can be changed into a prime (398694301) 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, 3896 + ... + 28505.

It is an arithmetic number, because the mean of its divisors is an integer number (31494744).

Almost surely, 2^398694305 is an apocalyptic number.

It is an amenable number.

398694305 is a deficient number, since it is larger than the sum of its proper divisors (105221599).

398694305 is a wasteful number, since it uses less digits than its factorization.

398694305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32536.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 398694305 is about 19967.3309433184. The cubic root of 398694305 is about 736.0037222411.

The spelling of 398694305 in words is "three hundred ninety-eight million, six hundred ninety-four thousand, three hundred five".