398909318 has 16 divisors (see below), whose sum is σ = 639718560. Its totient is φ = 185897856.

The previous prime is 398909221. The next prime is 398909341. The reversal of 398909318 is 813909893.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53453 + ... + 60456.

It is an arithmetic number, because the mean of its divisors is an integer number (39982410).

Almost surely, 2^398909318 is an apocalyptic number.

398909318 is a deficient number, since it is larger than the sum of its proper divisors (240809242).

398909318 is a wasteful number, since it uses less digits than its factorization.

398909318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114031.

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 398909318 is about 19972.7143373153. The cubic root of 398909318 is about 736.1360056532.

The spelling of 398909318 in words is "three hundred ninety-eight million, nine hundred nine thousand, three hundred eighteen".