728993141 has 4 divisors (see below), whose sum is σ = 729821484. Its totient is φ = 728164800.

The previous prime is 728993137. The next prime is 728993143. The reversal of 728993141 is 141399827.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 220671025 + 508322116 = 14855^2 + 22546^2 .

It is a cyclic number.

It is not a de Polignac number, because 728993141 - 2² = 728993137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 728993092 and 728993101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728993143) 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, 412850 + ... + 414611.

It is an arithmetic number, because the mean of its divisors is an integer number (182455371).

Almost surely, 2^728993141 is an apocalyptic number.

It is an amenable number.

728993141 is a deficient number, since it is larger than the sum of its proper divisors (828343).

728993141 is an equidigital number, since it uses as much as digits as its factorization.

728993141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828342.

The product of its digits is 108864, while the sum is 44.

The square root of 728993141 is about 26999.8729811827. The cubic root of 728993141 is about 899.9971773574.

The spelling of 728993141 in words is "seven hundred twenty-eight million, nine hundred ninety-three thousand, one hundred forty-one".