7828280540 has 12 divisors (see below), whose sum is σ = 16439389176. Its totient is φ = 3131312208.

The previous prime is 7828280491. The next prime is 7828280597. The reversal of 7828280540 is 450828287.

It is a super-2 number, since 2×7828280540² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7828280491 and 7828280500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195706994 + ... + 195707033.

It is an arithmetic number, because the mean of its divisors is an integer number (1369949098).

Almost surely, 2^7828280540 is an apocalyptic number.

It is an amenable number.

7828280540 is an abundant number, since it is smaller than the sum of its proper divisors (8611108636).

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

7828280540 is a wasteful number, since it uses less digits than its factorization.

7828280540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391414036 (or 391414034 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 44.

The square root of 7828280540 is about 88477.5708301262. The cubic root of 7828280540 is about 1985.5864188763.

The spelling of 7828280540 in words is "seven billion, eight hundred twenty-eight million, two hundred eighty thousand, five hundred forty".