398001966 has 16 divisors (see below), whose sum is σ = 797107584. Its totient is φ = 132483384.

The previous prime is 398001953. The next prime is 398001983. The reversal of 398001966 is 669100893.

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, 41260 + ... + 49983.

It is an arithmetic number, because the mean of its divisors is an integer number (49819224).

Almost surely, 2^398001966 is an apocalyptic number.

398001966 is an abundant number, since it is smaller than the sum of its proper divisors (399105618).

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

398001966 is a wasteful number, since it uses less digits than its factorization.

398001966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91975.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 398001966 is about 19949.9866165369. The cubic root of 398001966 is about 735.5774480131.

The spelling of 398001966 in words is "three hundred ninety-eight million, one thousand, nine hundred sixty-six".