723145806 has 80 divisors (see below), whose sum is σ = 1698526368. Its totient is φ = 229521600.

The previous prime is 723145793. The next prime is 723145837. The reversal of 723145806 is 608541327.

723145806 is a `hidden beast` number, since 72 + 3 + 1 + 4 + 580 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1568416 + ... + 1568876.

Almost surely, 2^723145806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 723145806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (849263184).

723145806 is an abundant number, since it is smaller than the sum of its proper divisors (975380562).

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

723145806 is a wasteful number, since it uses less digits than its factorization.

723145806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 910 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 723145806 is about 26891.3704745593. The cubic root of 723145806 is about 897.5843889375.

The spelling of 723145806 in words is "seven hundred twenty-three million, one hundred forty-five thousand, eight hundred six".