775632490 has 12 divisors (see below), whose sum is σ = 1396297026. Its totient is φ = 310217768.

The previous prime is 775632461. The next prime is 775632509. The reversal of 775632490 is 94236577.

It can be written as a sum of positive squares in only one way, i.e., 698069241 + 77563249 = 26421^2 + 8807^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 83667 + ... + 92473.

Almost surely, 2^775632490 is an apocalyptic number.

775632490 is a deficient number, since it is larger than the sum of its proper divisors (620664536).

775632490 is an frugal number, since it uses more digits than its factorization.

775632490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17621 (or 8814 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 43.

The square root of 775632490 is about 27850.1793531029. The cubic root of 775632490 is about 918.7950869323.

The spelling of 775632490 in words is "seven hundred seventy-five million, six hundred thirty-two thousand, four hundred ninety".