398353538 has 18 divisors (see below), whose sum is σ = 657301827. Its totient is φ = 180928660.

The previous prime is 398353531. The next prime is 398353573. The reversal of 398353538 is 835353893.

It can be written as a sum of positive squares in only one way, i.e., 199176769 + 199176769 = 14113^2 + 14113^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=14113.

It is a Duffinian number.

Its product of digits (1166400) is a multiple of the sum of its prime divisors (1296).

It is a junction number, because it is equal to n+sod(n) for n = 398353492 and 398353501.

It is not an unprimeable number, because it can be changed into a prime (398353531) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 309845 + ... + 311127.

Almost surely, 2^398353538 is an apocalyptic number.

398353538 is a deficient number, since it is larger than the sum of its proper divisors (258948289).

398353538 is an equidigital number, since it uses as much as digits as its factorization.

398353538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590 (or 1296 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 47.

The square root of 398353538 is about 19958.7960057715. The cubic root of 398353538 is about 735.7939731791.

The spelling of 398353538 in words is "three hundred ninety-eight million, three hundred fifty-three thousand, five hundred thirty-eight".