723898890 has 128 divisors (see below), whose sum is σ = 2268000000. Its totient is φ = 161982720.

The previous prime is 723898873. The next prime is 723898891. The reversal of 723898890 is 98898327.

It is a super-3 number, since 3×723898890³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (723898891) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 29236 + ... + 47984.

It is an arithmetic number, because the mean of its divisors is an integer number (17718750).

Almost surely, 2^723898890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 723898890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1134000000).

723898890 is an abundant number, since it is smaller than the sum of its proper divisors (1544101110).

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

723898890 is a wasteful number, since it uses less digits than its factorization.

723898890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18789 (or 18783 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The square root of 723898890 is about 26905.3691667667. The cubic root of 723898890 is about 897.8958622831.

The spelling of 723898890 in words is "seven hundred twenty-three million, eight hundred ninety-eight thousand, eight hundred ninety".