398246407 has 16 divisors (see below), whose sum is σ = 441070560. Its totient is φ = 357235200.

The previous prime is 398246393. The next prime is 398246413. The reversal of 398246407 is 704642893.

It is a cyclic number.

It is not a de Polignac number, because 398246407 - 2¹⁵ = 398213639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398246447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148444 + ... + 151102.

It is an arithmetic number, because the mean of its divisors is an integer number (27566910).

Almost surely, 2^398246407 is an apocalyptic number.

398246407 is a deficient number, since it is larger than the sum of its proper divisors (42824153).

398246407 is a wasteful number, since it uses less digits than its factorization.

398246407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 398246407 is about 19956.1120211328. The cubic root of 398246407 is about 735.7280071430.

The spelling of 398246407 in words is "three hundred ninety-eight million, two hundred forty-six thousand, four hundred seven".