405040530 has 16 divisors (see below), whose sum is σ = 972097344. Its totient is φ = 108010800.

The previous prime is 405040523. The next prime is 405040541. The reversal of 405040530 is 35040504.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 405040497 and 405040506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6750646 + ... + 6750705.

It is an arithmetic number, because the mean of its divisors is an integer number (60756084).

Almost surely, 2^405040530 is an apocalyptic number.

405040530 is an abundant number, since it is smaller than the sum of its proper divisors (567056814).

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

405040530 is a wasteful number, since it uses less digits than its factorization.

405040530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13501361.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 405040530 is about 20125.6187482522. The cubic root of 405040530 is about 739.8883018649. Note that the first 3 decimals are identical.

The spelling of 405040530 in words is "four hundred five million, forty thousand, five hundred thirty".