405490667 has 18 divisors (see below), whose sum is σ = 434346108. Its totient is φ = 378514312.

The previous prime is 405490649. The next prime is 405490703. The reversal of 405490667 is 766094504.

It is not a de Polignac number, because 405490667 - 2⁸ = 405490411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405490627) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1168388 + ... + 1168734.

Almost surely, 2^405490667 is an apocalyptic number.

405490667 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

405490667 is a deficient number, since it is larger than the sum of its proper divisors (28855441).

405490667 is an equidigital number, since it uses as much as digits as its factorization.

405490667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 405490667 is about 20136.7988270231. The cubic root of 405490667 is about 740.1622890954.

The spelling of 405490667 in words is "four hundred five million, four hundred ninety thousand, six hundred sixty-seven".