1604221492 has 6 divisors (see below), whose sum is σ = 2807387618. Its totient is φ = 802110744.

The previous prime is 1604221477. The next prime is 1604221513. The reversal of 1604221492 is 2941224061.

It can be written as a sum of positive squares in only one way, i.e., 903242916 + 700978576 = 30054^2 + 26476^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200527683 + ... + 200527690.

Almost surely, 2^1604221492 is an apocalyptic number.

It is an amenable number.

1604221492 is a deficient number, since it is larger than the sum of its proper divisors (1203166126).

1604221492 is a wasteful number, since it uses less digits than its factorization.

1604221492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401055377 (or 401055375 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 1604221492 is about 40052.7338892116. The cubic root of 1604221492 is about 1170.6348350645.

The spelling of 1604221492 in words is "one billion, six hundred four million, two hundred twenty-one thousand, four hundred ninety-two".