398894507 has 8 divisors (see below), whose sum is σ = 450163440. Its totient is φ = 350126560.

The previous prime is 398894501. The next prime is 398894527. The reversal of 398894507 is 705498893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398894507 - 2⁴ = 398894491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398894501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624908 + ... + 625545.

It is an arithmetic number, because the mean of its divisors is an integer number (56270430).

Almost surely, 2^398894507 is an apocalyptic number.

398894507 is a deficient number, since it is larger than the sum of its proper divisors (51268933).

398894507 is a wasteful number, since it uses less digits than its factorization.

398894507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250493.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 398894507 is about 19972.3435530235. The cubic root of 398894507 is about 736.1268949399.

The spelling of 398894507 in words is "three hundred ninety-eight million, eight hundred ninety-four thousand, five hundred seven".