405403072 has 28 divisors (see below), whose sum is σ = 817667656. Its totient is φ = 199376640.

The previous prime is 405403049. The next prime is 405403079. The reversal of 405403072 is 270304504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405403079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48018 + ... + 55825.

Almost surely, 2^405403072 is an apocalyptic number.

It is an amenable number.

405403072 is an abundant number, since it is smaller than the sum of its proper divisors (412264584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405403072 is a wasteful number, since it uses less digits than its factorization.

405403072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103916 (or 103906 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 405403072 is about 20134.6237114082. The cubic root of 405403072 is about 740.1089880866.

Adding to 405403072 its reverse (270304504), we get a palindrome (675707576).

The spelling of 405403072 in words is "four hundred five million, four hundred three thousand, seventy-two".