8397780 has 48 divisors (see below), whose sum is σ = 23876160. Its totient is φ = 2204928.

The previous prime is 8397761. The next prime is 8397793. The reversal of 8397780 is 877938.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2976 + ... + 5064.

It is an arithmetic number, because the mean of its divisors is an integer number (497420).

Almost surely, 2^8397780 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 8397780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11938080).

8397780 is an abundant number, since it is smaller than the sum of its proper divisors (15478380).

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

8397780 is a wasteful number, since it uses less digits than its factorization.

8397780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168 (or 2166 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 8397780 is about 2897.8923375447. The cubic root of 8397780 is about 203.2613618493.

The spelling of 8397780 in words is "eight million, three hundred ninety-seven thousand, seven hundred eighty".