723005920 has 384 divisors, whose sum is σ = 2341011456. Its totient is φ = 204374016.

The previous prime is 723005887. The next prime is 723005947. The reversal of 723005920 is 29500327.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5692897 + ... + 5693023.

It is an arithmetic number, because the mean of its divisors is an integer number (6096384).

Almost surely, 2^723005920 is an apocalyptic number.

723005920 is a gapful number since it is divisible by the number (70) 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 723005920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1170505728).

723005920 is an abundant number, since it is smaller than the sum of its proper divisors (1618005536).

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

723005920 is a wasteful number, since it uses less digits than its factorization.

723005920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 723005920 is about 26888.7694028567. The cubic root of 723005920 is about 897.5265086844.

The spelling of 723005920 in words is "seven hundred twenty-three million, five thousand, nine hundred twenty".