721050864 has 40 divisors (see below), whose sum is σ = 1864380672. Its totient is φ = 240135360.

The previous prime is 721050833. The next prime is 721050881. The reversal of 721050864 is 468050127.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 52987 + ... + 65189.

Almost surely, 2^721050864 is an apocalyptic number.

It is an amenable number.

721050864 is an abundant number, since it is smaller than the sum of its proper divisors (1143329808).

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

721050864 is a wasteful number, since it uses less digits than its factorization.

721050864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13445 (or 13439 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 721050864 is about 26852.3902846655. The cubic root of 721050864 is about 896.7167879803.

The spelling of 721050864 in words is "seven hundred twenty-one million, fifty thousand, eight hundred sixty-four".