398445605 has 16 divisors (see below), whose sum is σ = 482640960. Its totient is φ = 315767808.

The previous prime is 398445601. The next prime is 398445659. The reversal of 398445605 is 506544893.

It is a cyclic number.

It is not a de Polignac number, because 398445605 - 2² = 398445601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398445601) 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, 272366 + ... + 273824.

It is an arithmetic number, because the mean of its divisors is an integer number (30165060).

Almost surely, 2^398445605 is an apocalyptic number.

It is an amenable number.

398445605 is a deficient number, since it is larger than the sum of its proper divisors (84195355).

398445605 is a wasteful number, since it uses less digits than its factorization.

398445605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940.

The product of its (nonzero) digits is 518400, while the sum is 44.

The square root of 398445605 is about 19961.1022992219. The cubic root of 398445605 is about 735.8506540911.

The spelling of 398445605 in words is "three hundred ninety-eight million, four hundred forty-five thousand, six hundred five".