770229009 has 45 divisors (see below), whose sum is σ = 1266563389. Its totient is φ = 450708720.

The previous prime is 770228999. The next prime is 770229023. The reversal of 770229009 is 900922077.

The square root of 770229009 is 27753.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 1830609 + 768398400 = 1353^2 + 27720^2 .

It is not a de Polignac number, because 770229009 - 2⁷ = 770228881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (770225009) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 26559607 + ... + 26559635.

Almost surely, 2^770229009 is an apocalyptic number.

770229009 is the 27753-rd square number.

770229009 is the 13877-th centered octagonal number.

It is an amenable number.

770229009 is a deficient number, since it is larger than the sum of its proper divisors (496334380).

770229009 is an frugal number, since it uses more digits than its factorization.

770229009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The cubic root of 770229009 is about 916.6565029984.

Multiplying 770229009 by its sum of digits (36), we get a square (27728244324 = 166518²).

Multiplying 770229009 by its product of nonzero digits (15876), we get a square (12228155746884 = 3496878²).

The spelling of 770229009 in words is "seven hundred seventy million, two hundred twenty-nine thousand, nine".