7828887305 has 8 divisors (see below), whose sum is σ = 9408881544. Its totient is φ = 6253632000.

The previous prime is 7828887259. The next prime is 7828887317. The reversal of 7828887305 is 5037888287.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3492928201 + 4335959104 = 59101^2 + 65848^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7828887305 - 2⁸ = 7828887049 is a prime.

It is a super-2 number, since 2×7828887305² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1181096 + ... + 1187705.

It is an arithmetic number, because the mean of its divisors is an integer number (1176110193).

Almost surely, 2^7828887305 is an apocalyptic number.

It is an amenable number.

7828887305 is a deficient number, since it is larger than the sum of its proper divisors (1579994239).

7828887305 is a wasteful number, since it uses less digits than its factorization.

7828887305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369467.

The product of its (nonzero) digits is 6021120, while the sum is 56.

The square root of 7828887305 is about 88480.9996835479. Note that the first 3 decimals coincide. The cubic root of 7828887305 is about 1985.6377180606.

Adding to 7828887305 its sum of digits (56), we get a square (7828887361 = 88481²).

The spelling of 7828887305 in words is "seven billion, eight hundred twenty-eight million, eight hundred eighty-seven thousand, three hundred five".