398652140 has 24 divisors (see below), whose sum is σ = 856640400. Its totient is φ = 155752128.

The previous prime is 398652119. The next prime is 398652173. The reversal of 398652140 is 41256893.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 398652094 and 398652103.

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 7 ways as a sum of consecutive naturals, for example, 230915 + ... + 232634.

It is an arithmetic number, because the mean of its divisors is an integer number (35693350).

Almost surely, 2^398652140 is an apocalyptic number.

It is an amenable number.

398652140 is an abundant number, since it is smaller than the sum of its proper divisors (457988260).

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

398652140 is a wasteful number, since it uses less digits than its factorization.

398652140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463601 (or 463599 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 398652140 is about 19966.2750657202. The cubic root of 398652140 is about 735.9777753016.

The spelling of 398652140 in words is "three hundred ninety-eight million, six hundred fifty-two thousand, one hundred forty".