1305287238 has 16 divisors (see below), whose sum is σ = 2622283776. Its totient is φ = 433144200.

The previous prime is 1305287227. The next prime is 1305287239. The reversal of 1305287238 is 8327825031.

It is a junction number, because it is equal to n+sod(n) for n = 1305287196 and 1305287205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305287239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486438 + ... + 489113.

It is an arithmetic number, because the mean of its divisors is an integer number (163892736).

Almost surely, 2^1305287238 is an apocalyptic number.

1305287238 is an abundant number, since it is smaller than the sum of its proper divisors (1316996538).

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

1305287238 is a wasteful number, since it uses less digits than its factorization.

1305287238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975779.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 1305287238 is about 36128.7591538929. The cubic root of 1305287238 is about 1092.8704852499.

The spelling of 1305287238 in words is "one billion, three hundred five million, two hundred eighty-seven thousand, two hundred thirty-eight".