721472004 has 144 divisors (see below), whose sum is σ = 2097373824. Its totient is φ = 206976000.

The previous prime is 721471997. The next prime is 721472023. The reversal of 721472004 is 400274127.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1028854 + ... + 1029554.

It is an arithmetic number, because the mean of its divisors is an integer number (14565096).

Almost surely, 2^721472004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721472004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1048686912).

721472004 is an abundant number, since it is smaller than the sum of its proper divisors (1375901820).

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

721472004 is a wasteful number, since it uses less digits than its factorization.

721472004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 721472004 is about 26860.2308999755. The cubic root of 721472004 is about 896.8913340621.

The spelling of 721472004 in words is "seven hundred twenty-one million, four hundred seventy-two thousand, four".