1303387638 has 32 divisors (see below), whose sum is σ = 2981090304. Its totient is φ = 372156672.

The previous prime is 1303387633. The next prime is 1303387639. The reversal of 1303387638 is 8367833031.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1303387638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303387633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62131 + ... + 80417.

It is an arithmetic number, because the mean of its divisors is an integer number (93159072).

Almost surely, 2^1303387638 is an apocalyptic number.

1303387638 is an abundant number, since it is smaller than the sum of its proper divisors (1677702666).

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

1303387638 is a wasteful number, since it uses less digits than its factorization.

1303387638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19996.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 1303387638 is about 36102.4602762748. The cubic root of 1303387638 is about 1092.3400720677.

The spelling of 1303387638 in words is "one billion, three hundred three million, three hundred eighty-seven thousand, six hundred thirty-eight".