8421697240 has 32 divisors (see below), whose sum is σ = 20671439760. Its totient is φ = 3062435200.

The previous prime is 8421697217. The next prime is 8421697247. The reversal of 8421697240 is 427961248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421697247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9569671 + ... + 9570550.

Almost surely, 2^8421697240 is an apocalyptic number.

It is an amenable number.

8421697240 is an abundant number, since it is smaller than the sum of its proper divisors (12249742520).

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

8421697240 is a wasteful number, since it uses less digits than its factorization.

8421697240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19140243 (or 19140239 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 8421697240 is about 91769.8057097213. The cubic root of 8421697240 is about 2034.5414465841.

The spelling of 8421697240 in words is "eight billion, four hundred twenty-one million, six hundred ninety-seven thousand, two hundred forty".