8406780 has 48 divisors (see below), whose sum is σ = 23708160. Its totient is φ = 2225728.

The previous prime is 8406779. The next prime is 8406787. The reversal of 8406780 is 876048.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8406787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9601 + ... + 10439.

It is an arithmetic number, because the mean of its divisors is an integer number (493920).

Almost surely, 2^8406780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8406780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11854080).

8406780 is an abundant number, since it is smaller than the sum of its proper divisors (15301380).

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

8406780 is a wasteful number, since it uses less digits than its factorization.

8406780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018 (or 1016 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 8406780 is about 2899.4447744353. Note that the first 3 decimals coincide. The cubic root of 8406780 is about 203.3339484588. Note that the first 3 decimals are identical.

The spelling of 8406780 in words is "eight million, four hundred six thousand, seven hundred eighty".