721048986 has 64 divisors (see below), whose sum is σ = 1851897600. Its totient is φ = 203689728.

The previous prime is 721048981. The next prime is 721049027. The reversal of 721048986 is 689840127.

It is not an unprimeable number, because it can be changed into a prime (721048981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22926 + ... + 44358.

It is an arithmetic number, because the mean of its divisors is an integer number (28935900).

Almost surely, 2^721048986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721048986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (925948800).

721048986 is an abundant number, since it is smaller than the sum of its proper divisors (1130848614).

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

721048986 is a wasteful number, since it uses less digits than its factorization.

721048986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21540 (or 21534 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 721048986 is about 26852.3553156888. The cubic root of 721048986 is about 896.7160094705.

The spelling of 721048986 in words is "seven hundred twenty-one million, forty-eight thousand, nine hundred eighty-six".