8418729440 has 48 divisors (see below), whose sum is σ = 21697366320. Its totient is φ = 3061355520.

The previous prime is 8418729439. The next prime is 8418729479. The reversal of 8418729440 is 449278148.

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, 2389925 + ... + 2393444.

It is an arithmetic number, because the mean of its divisors is an integer number (452028465).

Almost surely, 2^8418729440 is an apocalyptic number.

8418729440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8418729440 is an abundant number, since it is smaller than the sum of its proper divisors (13278636880).

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

8418729440 is a wasteful number, since it uses less digits than its factorization.

8418729440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4783395 (or 4783387 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 47.

The square root of 8418729440 is about 91753.6344784227. The cubic root of 8418729440 is about 2034.3024281951.

The spelling of 8418729440 in words is "eight billion, four hundred eighteen million, seven hundred twenty-nine thousand, four hundred forty".