1990728304 has 10 divisors (see below), whose sum is σ = 3857036120. Its totient is φ = 995364144.

The previous prime is 1990728253. The next prime is 1990728307. The reversal of 1990728304 is 4038270991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990728307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62210244 + ... + 62210275.

It is an arithmetic number, because the mean of its divisors is an integer number (385703612).

Almost surely, 2^1990728304 is an apocalyptic number.

It is an amenable number.

1990728304 is a deficient number, since it is larger than the sum of its proper divisors (1866307816).

1990728304 is a wasteful number, since it uses less digits than its factorization.

1990728304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124420527 (or 124420521 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 1990728304 is about 44617.5784192733. The cubic root of 1990728304 is about 1257.9710993990.

The spelling of 1990728304 in words is "one billion, nine hundred ninety million, seven hundred twenty-eight thousand, three hundred four".