721412384 has 192 divisors, whose sum is σ = 1872605952. Its totient is φ = 265420800.

The previous prime is 721412339. The next prime is 721412399. The reversal of 721412384 is 483214127.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 721412384.

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, 3737792 + ... + 3737984.

It is an arithmetic number, because the mean of its divisors is an integer number (9753156).

Almost surely, 2^721412384 is an apocalyptic number.

721412384 is a gapful number since it is divisible by the number (74) 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 721412384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (936302976).

721412384 is an abundant number, since it is smaller than the sum of its proper divisors (1151193568).

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

721412384 is a wasteful number, since it uses less digits than its factorization.

721412384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 291 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 721412384 is about 26859.1210578455. The cubic root of 721412384 is about 896.8666280287.

The spelling of 721412384 in words is "seven hundred twenty-one million, four hundred twelve thousand, three hundred eighty-four".