728061388 has 6 divisors (see below), whose sum is σ = 1274107436. Its totient is φ = 364030692.

The previous prime is 728061379. The next prime is 728061401. The reversal of 728061388 is 883160827.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91007670 + ... + 91007677.

Almost surely, 2^728061388 is an apocalyptic number.

It is an amenable number.

728061388 is a deficient number, since it is larger than the sum of its proper divisors (546046048).

728061388 is a wasteful number, since it uses less digits than its factorization.

728061388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182015351 (or 182015349 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 728061388 is about 26982.6126978097. The cubic root of 728061388 is about 899.6135740247.

The spelling of 728061388 in words is "seven hundred twenty-eight million, sixty-one thousand, three hundred eighty-eight".