406740169 has 6 divisors (see below), whose sum is σ = 447078170. Its totient is φ = 369763680.

The previous prime is 406740157. The next prime is 406740193. The reversal of 406740169 is 961047604.

It can be written as a sum of positive squares in only one way, i.e., 406546569 + 193600 = 20163^2 + 440^2 .

It is not a de Polignac number, because 406740169 - 2⁵ = 406740137 is a prime.

It is a super-2 number, since 2×406740169² = 330875130156297122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (406740199) 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, 1680624 + ... + 1680865.

Almost surely, 2^406740169 is an apocalyptic number.

It is an amenable number.

406740169 is a deficient number, since it is larger than the sum of its proper divisors (40338001).

406740169 is a wasteful number, since it uses less digits than its factorization.

406740169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361511 (or 3361500 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 406740169 is about 20167.8003014707. The cubic root of 406740169 is about 740.9217689166.

The spelling of 406740169 in words is "four hundred six million, seven hundred forty thousand, one hundred sixty-nine".