721936030 has 16 divisors (see below), whose sum is σ = 1329706224. Its totient is φ = 282058560.

The previous prime is 721936021. The next prime is 721936031. The reversal of 721936030 is 30639127.

It is a junction number, because it is equal to n+sod(n) for n = 721935983 and 721936001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721936031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 839031 + ... + 839890.

It is an arithmetic number, because the mean of its divisors is an integer number (83106639).

Almost surely, 2^721936030 is an apocalyptic number.

721936030 is a deficient number, since it is larger than the sum of its proper divisors (607770194).

721936030 is a wasteful number, since it uses less digits than its factorization.

721936030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678971.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 721936030 is about 26868.8673002790. The cubic root of 721936030 is about 897.0835760818.

The spelling of 721936030 in words is "seven hundred twenty-one million, nine hundred thirty-six thousand, thirty".