8223457540 has 24 divisors (see below), whose sum is σ = 17292105432. Its totient is φ = 3285031680.

The previous prime is 8223457537. The next prime is 8223457547. The reversal of 8223457540 is 457543228.

It can be written as a sum of positive squares in 4 ways, for example, as 325225156 + 7898232384 = 18034^2 + 88872^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8223457493 and 8223457502.

It is not an unprimeable number, because it can be changed into a prime (8223457547) 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, 256441 + ... + 286720.

It is an arithmetic number, because the mean of its divisors is an integer number (720504393).

Almost surely, 2^8223457540 is an apocalyptic number.

It is an amenable number.

8223457540 is an abundant number, since it is smaller than the sum of its proper divisors (9068647892).

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

8223457540 is a wasteful number, since it uses less digits than its factorization.

8223457540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543927 (or 543925 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 40.

The square root of 8223457540 is about 90683.2814801053. The cubic root of 8223457540 is about 2018.4507236349.

The spelling of 8223457540 in words is "eight billion, two hundred twenty-three million, four hundred fifty-seven thousand, five hundred forty".