1305550938 has 64 divisors (see below), whose sum is σ = 2823776640. Its totient is φ = 400896000.

The previous prime is 1305550931. The next prime is 1305550949. The reversal of 1305550938 is 8390555031.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1305550896 and 1305550905.

It is not an unprimeable number, because it can be changed into a prime (1305550931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2412948 + ... + 2413488.

It is an arithmetic number, because the mean of its divisors is an integer number (44121510).

Almost surely, 2^1305550938 is an apocalyptic number.

1305550938 is an abundant number, since it is smaller than the sum of its proper divisors (1518225702).

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

1305550938 is a wasteful number, since it uses less digits than its factorization.

1305550938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023.

The product of its (nonzero) digits is 81000, while the sum is 39.

The square root of 1305550938 is about 36132.4084168216. The cubic root of 1305550938 is about 1092.9440758318.

The spelling of 1305550938 in words is "one billion, three hundred five million, five hundred fifty thousand, nine hundred thirty-eight".