721025984 has 84 divisors (see below), whose sum is σ = 1752127560. Its totient is φ = 292723200.

The previous prime is 721025983. The next prime is 721026001. The reversal of 721025984 is 489520127.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721025983) 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, 53534 + ... + 65634.

Almost surely, 2^721025984 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 721025984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (876063780).

721025984 is an abundant number, since it is smaller than the sum of its proper divisors (1031101576).

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

721025984 is a wasteful number, since it uses less digits than its factorization.

721025984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12146 (or 12129 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 721025984 is about 26851.9270072001. The cubic root of 721025984 is about 896.7064740661.

The spelling of 721025984 in words is "seven hundred twenty-one million, twenty-five thousand, nine hundred eighty-four".