398770605 has 24 divisors (see below), whose sum is σ = 707280288. Its totient is φ = 207730656.

The previous prime is 398770601. The next prime is 398770621. The reversal of 398770605 is 506077893.

It is a happy number.

398770605 is a `hidden beast` number, since 39 + 8 + 7 + 7 + 0 + 605 = 666.

It is not a de Polignac number, because 398770605 - 2² = 398770601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398770601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101107 + ... + 104976.

It is an arithmetic number, because the mean of its divisors is an integer number (29470012).

Almost surely, 2^398770605 is an apocalyptic number.

It is an amenable number.

398770605 is a deficient number, since it is larger than the sum of its proper divisors (308509683).

398770605 is a wasteful number, since it uses less digits than its factorization.

398770605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206137 (or 206134 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 398770605 is about 19969.2414728252. The cubic root of 398770605 is about 736.0506700751.

The spelling of 398770605 in words is "three hundred ninety-eight million, seven hundred seventy thousand, six hundred five".