398901242 has 16 divisors (see below), whose sum is σ = 628128000. Its totient is φ = 189743520.

The previous prime is 398901229. The next prime is 398901247. The reversal of 398901242 is 242109893.

It is a junction number, because it is equal to n+sod(n) for n = 398901196 and 398901205.

It is not an unprimeable number, because it can be changed into a prime (398901247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50867 + ... + 58182.

It is an arithmetic number, because the mean of its divisors is an integer number (39258000).

Almost surely, 2^398901242 is an apocalyptic number.

398901242 is a deficient number, since it is larger than the sum of its proper divisors (229226758).

398901242 is a wasteful number, since it uses less digits than its factorization.

398901242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109141.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 398901242 is about 19972.5121604669. The cubic root of 398901242 is about 736.1310378788.

The spelling of 398901242 in words is "three hundred ninety-eight million, nine hundred one thousand, two hundred forty-two".