398235507 has 8 divisors (see below), whose sum is σ = 531840960. Its totient is φ = 265060200.

The previous prime is 398235493. The next prime is 398235527. The reversal of 398235507 is 705532893.

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

It is not a de Polignac number, because 398235507 - 2⁶ = 398235443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398235527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105369 + ... + 109082.

It is an arithmetic number, because the mean of its divisors is an integer number (66480120).

Almost surely, 2^398235507 is an apocalyptic number.

398235507 is a deficient number, since it is larger than the sum of its proper divisors (133605453).

398235507 is a wasteful number, since it uses less digits than its factorization.

398235507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215073.

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 398235507 is about 19955.8389199753. The cubic root of 398235507 is about 735.7212947925.

The spelling of 398235507 in words is "three hundred ninety-eight million, two hundred thirty-five thousand, five hundred seven".