8778920 has 64 divisors (see below), whose sum is σ = 20820240. Its totient is φ = 3328000.

The previous prime is 8778901. The next prime is 8778947. The reversal of 8778920 is 298778.

It can be written as a sum of positive squares in 8 ways, for example, as 4866436 + 3912484 = 2206^2 + 1978^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86870 + ... + 86970.

Almost surely, 2^8778920 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 8778920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10410120).

8778920 is an abundant number, since it is smaller than the sum of its proper divisors (12041320).

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

8778920 is a wasteful number, since it uses less digits than its factorization.

8778920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 8778920 is about 2962.9242312283. The cubic root of 8778920 is about 206.2910392777.

The spelling of 8778920 in words is "eight million, seven hundred seventy-eight thousand, nine hundred twenty".