1003728394 has 4 divisors (see below), whose sum is σ = 1505592594. Its totient is φ = 501864196.

The previous prime is 1003728391. The next prime is 1003728431. The reversal of 1003728394 is 4938273001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4938273001 = 1201 ⋅4111801.

It can be written as a sum of positive squares in only one way, i.e., 519156225 + 484572169 = 22785^2 + 22013^2 .

It is not an unprimeable number, because it can be changed into a prime (1003728391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250932097 + ... + 250932100.

Almost surely, 2^1003728394 is an apocalyptic number.

1003728394 is a deficient number, since it is larger than the sum of its proper divisors (501864200).

1003728394 is an equidigital number, since it uses as much as digits as its factorization.

1003728394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501864199.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1003728394 is about 31681.6728409344. The cubic root of 1003728394 is about 1001.2412566445.

The spelling of 1003728394 in words is "one billion, three million, seven hundred twenty-eight thousand, three hundred ninety-four".