721228038 has 8 divisors (see below), whose sum is σ = 1442456088. Its totient is φ = 240409344.

The previous prime is 721228031. The next prime is 721228063. The reversal of 721228038 is 830822127.

It is a sphenic number, since it is the product of 3 distinct primes.

721228038 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721228031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60102331 + ... + 60102342.

It is an arithmetic number, because the mean of its divisors is an integer number (180307011).

Almost surely, 2^721228038 is an apocalyptic number.

721228038 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

721228038 is a wasteful number, since it uses less digits than its factorization.

721228038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120204678.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 721228038 is about 26855.6891179504. The cubic root of 721228038 is about 896.7902279632.

The spelling of 721228038 in words is "seven hundred twenty-one million, two hundred twenty-eight thousand, thirty-eight".