398672307 has 128 divisors (see below), whose sum is σ = 729907200. Its totient is φ = 212284800.

The previous prime is 398672291. The next prime is 398672347. The reversal of 398672307 is 703276893.

It is a happy number.

It is not a de Polignac number, because 398672307 - 2⁴ = 398672291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398672347) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7522093 + ... + 7522145.

It is an arithmetic number, because the mean of its divisors is an integer number (5702400).

Almost surely, 2^398672307 is an apocalyptic number.

398672307 is a deficient number, since it is larger than the sum of its proper divisors (331234893).

398672307 is a wasteful number, since it uses less digits than its factorization.

398672307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 398672307 is about 19966.7800859327. The cubic root of 398672307 is about 735.9901856314.

The spelling of 398672307 in words is "three hundred ninety-eight million, six hundred seventy-two thousand, three hundred seven".