727121328 has 20 divisors (see below), whose sum is σ = 1878396888. Its totient is φ = 242373760.

The previous prime is 727121327. The next prime is 727121383. The reversal of 727121328 is 823121727.

It is not an unprimeable number, because it can be changed into a prime (727121327) 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, 7574133 + ... + 7574228.

Almost surely, 2^727121328 is an apocalyptic number.

It is an amenable number.

727121328 is an abundant number, since it is smaller than the sum of its proper divisors (1151275560).

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

727121328 is a wasteful number, since it uses less digits than its factorization.

727121328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15148372 (or 15148366 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 727121328 is about 26965.1873347841. The cubic root of 727121328 is about 899.2262188777.

The spelling of 727121328 in words is "seven hundred twenty-seven million, one hundred twenty-one thousand, three hundred twenty-eight".