398342428 has 48 divisors (see below), whose sum is σ = 798626304. Its totient is φ = 172082240.

The previous prime is 398342401. The next prime is 398342459. The reversal of 398342428 is 824243893.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 167826 + ... + 170182.

It is an arithmetic number, because the mean of its divisors is an integer number (16638048).

Almost surely, 2^398342428 is an apocalyptic number.

It is an amenable number.

398342428 is an abundant number, since it is smaller than the sum of its proper divisors (400283876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398342428 is a wasteful number, since it uses less digits than its factorization.

398342428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562 (or 2560 counting only the distinct ones).

The product of its digits is 331776, while the sum is 43.

The square root of 398342428 is about 19958.5176804291. The cubic root of 398342428 is about 735.7871327336.

The spelling of 398342428 in words is "three hundred ninety-eight million, three hundred forty-two thousand, four hundred twenty-eight".