408163988 has 12 divisors (see below), whose sum is σ = 714513492. Its totient is φ = 204017280.

The previous prime is 408163981. The next prime is 408163997. The reversal of 408163988 is 889361804.

It can be written as a sum of positive squares in 2 ways, for example, as 304572304 + 103591684 = 17452^2 + 10178^2 .

It is a super-2 number, since 2×408163988² = 333195682200128288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408163981) 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 3 ways as a sum of consecutive naturals, for example, 245 + ... + 28572.

It is an arithmetic number, because the mean of its divisors is an integer number (59542791).

Almost surely, 2^408163988 is an apocalyptic number.

It is an amenable number.

408163988 is a deficient number, since it is larger than the sum of its proper divisors (306349504).

408163988 is a wasteful number, since it uses less digits than its factorization.

408163988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32362 (or 32360 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 408163988 is about 20203.0687767973. The cubic root of 408163988 is about 741.7853094942.

The spelling of 408163988 in words is "four hundred eight million, one hundred sixty-three thousand, nine hundred eighty-eight".