398187006 has 32 divisors (see below), whose sum is σ = 912238848. Its totient is φ = 113505600.

The previous prime is 398186989. The next prime is 398187029. The reversal of 398187006 is 600781893.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7906 + ... + 29306.

It is an arithmetic number, because the mean of its divisors is an integer number (28507464).

Almost surely, 2^398187006 is an apocalyptic number.

398187006 is an abundant number, since it is smaller than the sum of its proper divisors (514051842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398187006 is a wasteful number, since it uses less digits than its factorization.

398187006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21856.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 398187006 is about 19954.6236747276. The cubic root of 398187006 is about 735.6914258108.

The spelling of 398187006 in words is "three hundred ninety-eight million, one hundred eighty-seven thousand, six".