721541376 has 108 divisors (see below), whose sum is σ = 2129054928. Its totient is φ = 234888192.

The previous prime is 721541371. The next prime is 721541377. The reversal of 721541376 is 673145127.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 721541376.

It is not an unprimeable number, because it can be changed into a prime (721541371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95431 + ... + 102713.

Almost surely, 2^721541376 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 721541376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1064527464).

721541376 is an abundant number, since it is smaller than the sum of its proper divisors (1407513552).

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

721541376 is a wasteful number, since it uses less digits than its factorization.

721541376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7348 (or 7331 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 721541376 is about 26861.5222204550. The cubic root of 721541376 is about 896.9200795303.

The spelling of 721541376 in words is "seven hundred twenty-one million, five hundred forty-one thousand, three hundred seventy-six".