7928730 has 48 divisors (see below), whose sum is σ = 21180744. Its totient is φ = 2056320.

The previous prime is 7928717. The next prime is 7928761. The reversal of 7928730 is 378297.

It can be written as a sum of positive squares in 4 ways, for example, as 5294601 + 2634129 = 2301^2 + 1623^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2140 + ... + 4520.

Almost surely, 2^7928730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7928730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10590372).

7928730 is an abundant number, since it is smaller than the sum of its proper divisors (13252014).

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

7928730 is a wasteful number, since it uses less digits than its factorization.

7928730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431 (or 2428 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 7928730 is about 2815.8000639250. The cubic root of 7928730 is about 199.4043108671.

The spelling of 7928730 in words is "seven million, nine hundred twenty-eight thousand, seven hundred thirty".