8420557700 has 18 divisors (see below), whose sum is σ = 18272610426. Its totient is φ = 3368223040.

The previous prime is 8420557687. The next prime is 8420557709. The reversal of 8420557700 is 77550248.

It can be written as a sum of positive squares in 3 ways, for example, as 69522244 + 8351035456 = 8338^2 + 91384^2 .

It is not an unprimeable number, because it can be changed into a prime (8420557709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42102689 + ... + 42102888.

Almost surely, 2^8420557700 is an apocalyptic number.

It is an amenable number.

8420557700 is an abundant number, since it is smaller than the sum of its proper divisors (9852052726).

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

8420557700 is a wasteful number, since it uses less digits than its factorization.

8420557700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84205591 (or 84205584 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 8420557700 is about 91763.5968126795. The cubic root of 8420557700 is about 2034.4496778320.

The spelling of 8420557700 in words is "eight billion, four hundred twenty million, five hundred fifty-seven thousand, seven hundred".