398434172 has 6 divisors (see below), whose sum is σ = 697259808. Its totient is φ = 199217084.

The previous prime is 398434163. The next prime is 398434207. The reversal of 398434172 is 271434893.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49804268 + ... + 49804275.

It is an arithmetic number, because the mean of its divisors is an integer number (116209968).

Almost surely, 2^398434172 is an apocalyptic number.

It is an amenable number.

398434172 is a deficient number, since it is larger than the sum of its proper divisors (298825636).

398434172 is a wasteful number, since it uses less digits than its factorization.

398434172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99608547 (or 99608545 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 398434172 is about 19960.8159151874. The cubic root of 398434172 is about 735.8436158565.

The spelling of 398434172 in words is "three hundred ninety-eight million, four hundred thirty-four thousand, one hundred seventy-two".