405344655 has 96 divisors (see below), whose sum is σ = 763176960. Its totient is φ = 206219520.

The previous prime is 405344587. The next prime is 405344659. The reversal of 405344655 is 556443504.

It is not a de Polignac number, because 405344655 - 2⁹ = 405344143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405344659) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3935334 + ... + 3935436.

It is an arithmetic number, because the mean of its divisors is an integer number (7949760).

Almost surely, 2^405344655 is an apocalyptic number.

405344655 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

405344655 is a deficient number, since it is larger than the sum of its proper divisors (357832305).

405344655 is a wasteful number, since it uses less digits than its factorization.

405344655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

The square root of 405344655 is about 20133.1729988097. The cubic root of 405344655 is about 740.0734374404.

The spelling of 405344655 in words is "four hundred five million, three hundred forty-four thousand, six hundred fifty-five".