1305628005 has 32 divisors (see below), whose sum is σ = 2378004480. Its totient is φ = 605506880.

The previous prime is 1305627977. The next prime is 1305628013. The reversal of 1305628005 is 5008265031.

It is not a de Polignac number, because 1305628005 - 2¹⁴ = 1305611621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168225 + ... + 175814.

It is an arithmetic number, because the mean of its divisors is an integer number (74312640).

Almost surely, 2^1305628005 is an apocalyptic number.

1305628005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1305628005 is a deficient number, since it is larger than the sum of its proper divisors (1072376475).

1305628005 is a wasteful number, since it uses less digits than its factorization.

1305628005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344081.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1305628005 is about 36133.4748536589. The cubic root of 1305628005 is about 1092.9655809965.

The spelling of 1305628005 in words is "one billion, three hundred five million, six hundred twenty-eight thousand, five".