398541836 has 24 divisors (see below), whose sum is σ = 869546496. Its totient is φ = 155275920.

The previous prime is 398541833. The next prime is 398541839. The reversal of 398541836 is 638145893.

It is an interprime number because it is at equal distance from previous prime (398541833) and next prime (398541839).

It is not an unprimeable number, because it can be changed into a prime (398541833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646676 + ... + 647291.

It is an arithmetic number, because the mean of its divisors is an integer number (36231104).

Almost surely, 2^398541836 is an apocalyptic number.

It is an amenable number.

398541836 is an abundant number, since it is smaller than the sum of its proper divisors (471004660).

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

398541836 is a wasteful number, since it uses less digits than its factorization.

398541836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293989 (or 1293987 counting only the distinct ones).

The product of its digits is 622080, while the sum is 47.

The square root of 398541836 is about 19963.5126167716. The cubic root of 398541836 is about 735.9098892318.

The spelling of 398541836 in words is "three hundred ninety-eight million, five hundred forty-one thousand, eight hundred thirty-six".