721384092 has 108 divisors (see below), whose sum is σ = 2158691080. Its totient is φ = 201769920.

The previous prime is 721384073. The next prime is 721384099. The reversal of 721384092 is 290483127.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721384099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 50259 + ... + 62997.

Almost surely, 2^721384092 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 721384092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1079345540).

721384092 is an abundant number, since it is smaller than the sum of its proper divisors (1437306988).

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

721384092 is a wasteful number, since it uses less digits than its factorization.

721384092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12784 (or 12768 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 721384092 is about 26858.5943787087. The cubic root of 721384092 is about 896.8549035824.

The spelling of 721384092 in words is "seven hundred twenty-one million, three hundred eighty-four thousand, ninety-two".