721888070 has 16 divisors (see below), whose sum is σ = 1310899680. Its totient is φ = 286199424.

The previous prime is 721888007. The next prime is 721888073. The reversal of 721888070 is 70888127.

It is a super-2 number, since 2×721888070² = 1042244771216649800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721888073) 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 7 ways as a sum of consecutive naturals, for example, 318290 + ... + 320549.

It is an arithmetic number, because the mean of its divisors is an integer number (81931230).

Almost surely, 2^721888070 is an apocalyptic number.

721888070 is a deficient number, since it is larger than the sum of its proper divisors (589011610).

721888070 is a wasteful number, since it uses less digits than its factorization.

721888070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638959.

The product of its (nonzero) digits is 50176, while the sum is 41.

The square root of 721888070 is about 26867.9748027275. The cubic root of 721888070 is about 897.0637104800.

The spelling of 721888070 in words is "seven hundred twenty-one million, eight hundred eighty-eight thousand, seventy".