765434990 has 16 divisors (see below), whose sum is σ = 1425293280. Its totient is φ = 295616160.

The previous prime is 765434953. The next prime is 765435017. The reversal of 765434990 is 99434567.

It is a happy number.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 1319426 + ... + 1320005.

It is an arithmetic number, because the mean of its divisors is an integer number (89080830).

Almost surely, 2^765434990 is an apocalyptic number.

765434990 is a deficient number, since it is larger than the sum of its proper divisors (659858290).

765434990 is a wasteful number, since it uses less digits than its factorization.

765434990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639467.

The product of its (nonzero) digits is 816480, while the sum is 47.

The square root of 765434990 is about 27666.4958026852. The cubic root of 765434990 is about 914.7507418235.

The spelling of 765434990 in words is "seven hundred sixty-five million, four hundred thirty-four thousand, nine hundred ninety".