405729946 has 16 divisors (see below), whose sum is σ = 621561600. Its totient is φ = 198561168.

The previous prime is 405729943. The next prime is 405729949. The reversal of 405729946 is 649927504.

It is an interprime number because it is at equal distance from previous prime (405729943) and next prime (405729949).

It is a junction number, because it is equal to n+sod(n) for n = 405729896 and 405729905.

It is not an unprimeable number, because it can be changed into a prime (405729941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42175 + ... + 50893.

It is an arithmetic number, because the mean of its divisors is an integer number (38847600).

Almost surely, 2^405729946 is an apocalyptic number.

405729946 is a deficient number, since it is larger than the sum of its proper divisors (215831654).

405729946 is a wasteful number, since it uses less digits than its factorization.

405729946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9213.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 405729946 is about 20142.7392873958. The cubic root of 405729946 is about 740.3078497554.

The spelling of 405729946 in words is "four hundred five million, seven hundred twenty-nine thousand, nine hundred forty-six".