1305438950 has 24 divisors (see below), whose sum is σ = 2429904000. Its totient is φ = 521791200.

The previous prime is 1305438931. The next prime is 1305438971. The reversal of 1305438950 is 598345031.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64676 + ... + 82424.

It is an arithmetic number, because the mean of its divisors is an integer number (101246000).

Almost surely, 2^1305438950 is an apocalyptic number.

1305438950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1305438950 is a deficient number, since it is larger than the sum of its proper divisors (1124465050).

1305438950 is a wasteful number, since it uses less digits than its factorization.

1305438950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19232 (or 19227 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 1305438950 is about 36130.8586944733. The cubic root of 1305438950 is about 1092.9128246265.

The spelling of 1305438950 in words is "one billion, three hundred five million, four hundred thirty-eight thousand, nine hundred fifty".