8408431998 has 12 divisors (see below), whose sum is σ = 18218269368. Its totient is φ = 2802810660.

The previous prime is 8408431957. The next prime is 8408432009. The reversal of 8408431998 is 8991348048.

8408431998 is a `hidden beast` number, since 8 + 408 + 43 + 199 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 233567538 + ... + 233567573.

It is an arithmetic number, because the mean of its divisors is an integer number (1518189114).

Almost surely, 2^8408431998 is an apocalyptic number.

8408431998 is an abundant number, since it is smaller than the sum of its proper divisors (9809837370).

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

8408431998 is a wasteful number, since it uses less digits than its factorization.

8408431998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467135119 (or 467135116 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The square root of 8408431998 is about 91697.5026813708. The cubic root of 8408431998 is about 2033.4726649006.

The spelling of 8408431998 in words is "eight billion, four hundred eight million, four hundred thirty-one thousand, nine hundred ninety-eight".