1305472638 has 16 divisors (see below), whose sum is σ = 2642403456. Its totient is φ = 429914520.

The previous prime is 1305472631. The next prime is 1305472639. The reversal of 1305472638 is 8362745031.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1305472596 and 1305472605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305472631) 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, 1310218 + ... + 1311213.

It is an arithmetic number, because the mean of its divisors is an integer number (165150216).

Almost surely, 2^1305472638 is an apocalyptic number.

1305472638 is an abundant number, since it is smaller than the sum of its proper divisors (1336930818).

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

1305472638 is a wasteful number, since it uses less digits than its factorization.

1305472638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2621519.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 1305472638 is about 36131.3248857553. The cubic root of 1305472638 is about 1092.9222257378.

The spelling of 1305472638 in words is "one billion, three hundred five million, four hundred seventy-two thousand, six hundred thirty-eight".