721480998 has 48 divisors (see below), whose sum is σ = 1680694704. Its totient is φ = 205873920.

The previous prime is 721480993. The next prime is 721481027. The reversal of 721480998 is 899084127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721480993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 434586 + ... + 436242.

It is an arithmetic number, because the mean of its divisors is an integer number (35014473).

Almost surely, 2^721480998 is an apocalyptic number.

721480998 is an abundant number, since it is smaller than the sum of its proper divisors (959213706).

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

721480998 is a wasteful number, since it uses less digits than its factorization.

721480998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157 (or 3150 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 721480998 is about 26860.3983216928. The cubic root of 721480998 is about 896.8950609830.

The spelling of 721480998 in words is "seven hundred twenty-one million, four hundred eighty thousand, nine hundred ninety-eight".