405123630 has 32 divisors (see below), whose sum is σ = 978130944. Its totient is φ = 107384736.

The previous prime is 405123599. The next prime is 405123673. The reversal of 405123630 is 36321504.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 405123630.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 35422 + ... + 45441.

It is an arithmetic number, because the mean of its divisors is an integer number (30566592).

Almost surely, 2^405123630 is an apocalyptic number.

405123630 is an abundant number, since it is smaller than the sum of its proper divisors (573007314).

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

405123630 is a wasteful number, since it uses less digits than its factorization.

405123630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81040.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 405123630 is about 20127.6831751695. The cubic root of 405123630 is about 739.9388980472.

The spelling of 405123630 in words is "four hundred five million, one hundred twenty-three thousand, six hundred thirty".