721030896 has 50 divisors (see below), whose sum is σ = 2086876352. Its totient is φ = 240343200.

The previous prime is 721030861. The next prime is 721030897. The reversal of 721030896 is 698030127.

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 721030896.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721030897) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 276880 + ... + 279471.

Almost surely, 2^721030896 is an apocalyptic number.

It is an amenable number.

721030896 is an abundant number, since it is smaller than the sum of its proper divisors (1365845456).

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

721030896 is a wasteful number, since it uses less digits than its factorization.

721030896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556371 (or 556356 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 721030896 is about 26852.0184716159. The cubic root of 721030896 is about 896.7085103368.

The spelling of 721030896 in words is "seven hundred twenty-one million, thirty thousand, eight hundred ninety-six".