405288669 has 16 divisors (see below), whose sum is σ = 544152960. Its totient is φ = 268316160.

The previous prime is 405288643. The next prime is 405288671. The reversal of 405288669 is 966882504.

It is a happy number.

It is not a de Polignac number, because 405288669 - 2²⁷ = 271070941 is a prime.

It is a super-2 number, since 2×405288669² = 328517810439583122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405288629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313777 + ... + 315065.

It is an arithmetic number, because the mean of its divisors is an integer number (34009560).

Almost surely, 2^405288669 is an apocalyptic number.

It is an amenable number.

405288669 is a deficient number, since it is larger than the sum of its proper divisors (138864291).

405288669 is a wasteful number, since it uses less digits than its factorization.

405288669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940.

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 405288669 is about 20131.7825589291. The cubic root of 405288669 is about 740.0393630145.

The spelling of 405288669 in words is "four hundred five million, two hundred eighty-eight thousand, six hundred sixty-nine".