723436428 has 96 divisors (see below), whose sum is σ = 2099865600. Its totient is φ = 190448640.

The previous prime is 723436409. The next prime is 723436459. The reversal of 723436428 is 824634327.

723436428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16773 + ... + 41571.

It is an arithmetic number, because the mean of its divisors is an integer number (21873600).

Almost surely, 2^723436428 is an apocalyptic number.

723436428 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 723436428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1049932800).

723436428 is an abundant number, since it is smaller than the sum of its proper divisors (1376429172).

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

723436428 is a wasteful number, since it uses less digits than its factorization.

723436428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24847 (or 24845 counting only the distinct ones).

The product of its digits is 193536, while the sum is 39.

The square root of 723436428 is about 26896.7735611541. The cubic root of 723436428 is about 897.7046149606.

The spelling of 723436428 in words is "seven hundred twenty-three million, four hundred thirty-six thousand, four hundred twenty-eight".