8400099440 has 40 divisors (see below), whose sum is σ = 19945776960. Its totient is φ = 3288548096.

The previous prime is 8400099437. The next prime is 8400099511. The reversal of 8400099440 is 449900048.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 8400099394 and 8400099403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1113275 + ... + 1120794.

It is an arithmetic number, because the mean of its divisors is an integer number (498644424).

Almost surely, 2^8400099440 is an apocalyptic number.

8400099440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8400099440 is an abundant number, since it is smaller than the sum of its proper divisors (11545677520).

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

8400099440 is a wasteful number, since it uses less digits than its factorization.

8400099440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234129 (or 2234123 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 8400099440 is about 91652.0563871864. The cubic root of 8400099440 is about 2032.8007350626.

Adding to 8400099440 its reverse (449900048), we get a palindrome (8849999488).

The spelling of 8400099440 in words is "eight billion, four hundred million, ninety-nine thousand, four hundred forty".