1064789638 has 16 divisors (see below), whose sum is σ = 1771917120. Its totient is φ = 475791400.

The previous prime is 1064789629. The next prime is 1064789641. The reversal of 1064789638 is 8369874601.

It is a happy number.

It is a super-2 number, since 2×1064789638² = 2267553946384342088, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 408868 + ... + 411463.

It is an arithmetic number, because the mean of its divisors is an integer number (110744820).

Almost surely, 2^1064789638 is an apocalyptic number.

1064789638 is a deficient number, since it is larger than the sum of its proper divisors (707127482).

1064789638 is a wasteful number, since it uses less digits than its factorization.

1064789638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820403.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 1064789638 is about 32631.1145687670. The cubic root of 1064789638 is about 1021.1462309775.

The spelling of 1064789638 in words is "one billion, sixty-four million, seven hundred eighty-nine thousand, six hundred thirty-eight".