147721328 has 20 divisors (see below), whose sum is σ = 287085048. Its totient is φ = 73634880.

The previous prime is 147721307. The next prime is 147721349. The reversal of 147721328 is 823127741.

It is an interprime number because it is at equal distance from previous prime (147721307) and next prime (147721349).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8651 + ... + 19242.

Almost surely, 2^147721328 is an apocalyptic number.

It is an amenable number.

147721328 is a deficient number, since it is larger than the sum of its proper divisors (139363720).

147721328 is a wasteful number, since it uses less digits than its factorization.

147721328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28232 (or 28226 counting only the distinct ones).

The product of its digits is 18816, while the sum is 35.

The square root of 147721328 is about 12154.0663154353. The cubic root of 147721328 is about 528.6250441422.

The spelling of 147721328 in words is "one hundred forty-seven million, seven hundred twenty-one thousand, three hundred twenty-eight".