723405406 has 16 divisors (see below), whose sum is σ = 1125446400. Its totient is φ = 348321568.

The previous prime is 723405401. The next prime is 723405413. The reversal of 723405406 is 604504327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723405401) 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, 6531 + ... + 38593.

It is an arithmetic number, because the mean of its divisors is an integer number (70340400).

Almost surely, 2^723405406 is an apocalyptic number.

723405406 is a deficient number, since it is larger than the sum of its proper divisors (402040994).

723405406 is a wasteful number, since it uses less digits than its factorization.

723405406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32483.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 723405406 is about 26896.1968687025. The cubic root of 723405406 is about 897.6917831532.

The spelling of 723405406 in words is "seven hundred twenty-three million, four hundred five thousand, four hundred six".