398498738 has 40 divisors (see below), whose sum is σ = 680275200. Its totient is φ = 174893400.

The previous prime is 398498731. The next prime is 398498741. The reversal of 398498738 is 837894893.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (398498731) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 907523 + ... + 907961.

It is an arithmetic number, because the mean of its divisors is an integer number (17006880).

Almost surely, 2^398498738 is an apocalyptic number.

398498738 is a deficient number, since it is larger than the sum of its proper divisors (281776462).

398498738 is an equidigital number, since it uses as much as digits as its factorization.

398498738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516 (or 483 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 59.

The square root of 398498738 is about 19962.4331683290. The cubic root of 398498738 is about 735.8833613704.

The spelling of 398498738 in words is "three hundred ninety-eight million, four hundred ninety-eight thousand, seven hundred thirty-eight".