8928720 has 60 divisors (see below), whose sum is σ = 29988036. Its totient is φ = 2380800.

The previous prime is 8928719. The next prime is 8928721. The reversal of 8928720 is 278298.

It is an interprime number because it is at equal distance from previous prime (8928719) and next prime (8928721).

It can be written as a sum of positive squares in 2 ways, for example, as 3283344 + 5645376 = 1812^2 + 2376^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8928721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5481 + ... + 6920.

Almost surely, 2^8928720 is an apocalyptic number.

8928720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8928720 is an abundant number, since it is smaller than the sum of its proper divisors (21059316).

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

8928720 is a wasteful number, since it uses less digits than its factorization.

8928720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12420 (or 12411 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 8928720 is about 2988.0963839876. The cubic root of 8928720 is about 207.4577840280.

The spelling of 8928720 in words is "eight million, nine hundred twenty-eight thousand, seven hundred twenty".