723916890 has 48 divisors (see below), whose sum is σ = 1913053896. Its totient is φ = 189878400.

The previous prime is 723916883. The next prime is 723916901. The reversal of 723916890 is 98619327.

It can be written as a sum of positive squares in 4 ways, for example, as 173686041 + 550230849 = 13179^2 + 23457^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60441 + ... + 71420.

Almost surely, 2^723916890 is an apocalyptic number.

723916890 is an abundant number, since it is smaller than the sum of its proper divisors (1189137006).

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

723916890 is a wasteful number, since it uses less digits than its factorization.

723916890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131935 (or 131932 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 723916890 is about 26905.7036704116. The cubic root of 723916890 is about 897.9033043867.

The spelling of 723916890 in words is "seven hundred twenty-three million, nine hundred sixteen thousand, eight hundred ninety".