721536030 has 48 divisors (see below), whose sum is σ = 1879703280. Its totient is φ = 192029184.

The previous prime is 721536007. The next prime is 721536041. The reversal of 721536030 is 30635127.

It is a happy number.

721536030 is a `hidden beast` number, since 7 + 2 + 1 + 53 + 603 + 0 = 666.

It is a super-2 number, since 2×721536030² = 1041228485176321800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 721535985 and 721536003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39406 + ... + 54734.

It is an arithmetic number, because the mean of its divisors is an integer number (39160485).

Almost surely, 2^721536030 is an apocalyptic number.

721536030 is an abundant number, since it is smaller than the sum of its proper divisors (1158167250).

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

721536030 is a wasteful number, since it uses less digits than its factorization.

721536030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15865 (or 15862 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 721536030 is about 26861.4227099013. The cubic root of 721536030 is about 896.9178643898.

The spelling of 721536030 in words is "seven hundred twenty-one million, five hundred thirty-six thousand, thirty".