8401687090 has 8 divisors (see below), whose sum is σ = 15123036780. Its totient is φ = 3360674832.

The previous prime is 8401687087. The next prime is 8401687097. The reversal of 8401687090 is 907861048.

It can be written as a sum of positive squares in 2 ways, for example, as 7925094529 + 476592561 = 89023^2 + 21831^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (8401687097) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 420084345 + ... + 420084364.

Almost surely, 2^8401687090 is an apocalyptic number.

8401687090 is a deficient number, since it is larger than the sum of its proper divisors (6721349690).

8401687090 is a wasteful number, since it uses less digits than its factorization.

8401687090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840168716.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 8401687090 is about 91660.7172675405. The cubic root of 8401687090 is about 2032.9287959585.

The spelling of 8401687090 in words is "eight billion, four hundred one million, six hundred eighty-seven thousand, ninety".