8557420 has 24 divisors (see below), whose sum is σ = 18041184. Its totient is φ = 3409536.

The previous prime is 8557411. The next prime is 8557421. The reversal of 8557420 is 247558.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (8557421) 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, 5577 + ... + 6943.

It is an arithmetic number, because the mean of its divisors is an integer number (751716).

Almost surely, 2^8557420 is an apocalyptic number.

It is an amenable number.

8557420 is an abundant number, since it is smaller than the sum of its proper divisors (9483764).

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

8557420 is a wasteful number, since it uses less digits than its factorization.

8557420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 1687 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 8557420 is about 2925.3068215146. The cubic root of 8557420 is about 204.5412705167.

The spelling of 8557420 in words is "eight million, five hundred fifty-seven thousand, four hundred twenty".