7928280 has 80 divisors (see below), whose sum is σ = 26658720. Its totient is φ = 2113344.

The previous prime is 7928269. The next prime is 7928303. The reversal of 7928280 is 828297.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2017 + ... + 4463.

It is an arithmetic number, because the mean of its divisors is an integer number (333234).

Almost surely, 2^7928280 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 7928280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13329360).

7928280 is an abundant number, since it is smaller than the sum of its proper divisors (18730440).

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

7928280 is a wasteful number, since it uses less digits than its factorization.

7928280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470 (or 2457 counting only the distinct ones).

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

The square root of 7928280 is about 2815.7201565497. The cubic root of 7928280 is about 199.4005383572.

The spelling of 7928280 in words is "seven million, nine hundred twenty-eight thousand, two hundred eighty".