405502023 has 16 divisors (see below), whose sum is σ = 555706880. Its totient is φ = 262918656.

The previous prime is 405502007. The next prime is 405502033. The reversal of 405502023 is 320205504.

It is not a de Polignac number, because 405502023 - 2⁴ = 405502007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405502033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3111 + ... + 28647.

It is an arithmetic number, because the mean of its divisors is an integer number (34731680).

Almost surely, 2^405502023 is an apocalyptic number.

405502023 is a deficient number, since it is larger than the sum of its proper divisors (150204857).

405502023 is a wasteful number, since it uses less digits than its factorization.

405502023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25686.

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

The square root of 405502023 is about 20137.0807963816. The cubic root of 405502023 is about 740.1691985882.

Adding to 405502023 its reverse (320205504), we get a palindrome (725707527).

The spelling of 405502023 in words is "four hundred five million, five hundred two thousand, twenty-three".