303728728 has 16 divisors (see below), whose sum is σ = 575363880. Its totient is φ = 150298368.

The previous prime is 303728713. The next prime is 303728729. The reversal of 303728728 is 827827303.

It is a super-2 number, since 2×303728728² = 184502280424995968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303728729) 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, 194926 + ... + 196477.

Almost surely, 2^303728728 is an apocalyptic number.

It is an amenable number.

303728728 is a deficient number, since it is larger than the sum of its proper divisors (271635152).

303728728 is a wasteful number, since it uses less digits than its factorization.

303728728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391506 (or 391502 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 303728728 is about 17427.8147798283. The cubic root of 303728728 is about 672.1950196927.

The spelling of 303728728 in words is "three hundred three million, seven hundred twenty-eight thousand, seven hundred twenty-eight".