404897769 has 6 divisors (see below), whose sum is σ = 584852346. Its totient is φ = 269931840.

The previous prime is 404897767. The next prime is 404897803. The reversal of 404897769 is 967798404.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 394419600 + 10478169 = 19860^2 + 3237^2 .

It is not a de Polignac number, because 404897769 - 2¹ = 404897767 is a prime.

It is a super-3 number, since 3×404897769³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (404897767) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22494312 + ... + 22494329.

It is an arithmetic number, because the mean of its divisors is an integer number (97475391).

Almost surely, 2^404897769 is an apocalyptic number.

It is an amenable number.

404897769 is a deficient number, since it is larger than the sum of its proper divisors (179954577).

404897769 is a wasteful number, since it uses less digits than its factorization.

404897769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44988647 (or 44988644 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The square root of 404897769 is about 20122.0716875773. The cubic root of 404897769 is about 739.8013643872.

The spelling of 404897769 in words is "four hundred four million, eight hundred ninety-seven thousand, seven hundred sixty-nine".