721690350 has 24 divisors (see below), whose sum is σ = 1789792440. Its totient is φ = 192450720.

The previous prime is 721690339. The next prime is 721690367. The reversal of 721690350 is 53096127.

721690350 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×721690350² = 1041673922566245000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2405485 + ... + 2405784.

It is an arithmetic number, because the mean of its divisors is an integer number (74574685).

Almost surely, 2^721690350 is an apocalyptic number.

721690350 is an abundant number, since it is smaller than the sum of its proper divisors (1068102090).

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

721690350 is a wasteful number, since it uses less digits than its factorization.

721690350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4811284 (or 4811279 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 721690350 is about 26864.2950772954. The cubic root of 721690350 is about 896.9818032150.

The spelling of 721690350 in words is "seven hundred twenty-one million, six hundred ninety thousand, three hundred fifty".