1604220365 has 16 divisors (see below), whose sum is σ = 2120466816. Its totient is φ = 1155374400.

The previous prime is 1604220349. The next prime is 1604220383. The reversal of 1604220365 is 5630224061.

It is not a de Polignac number, because 1604220365 - 2⁴ = 1604220349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135926 + ... + 147255.

It is an arithmetic number, because the mean of its divisors is an integer number (132529176).

Almost surely, 2^1604220365 is an apocalyptic number.

It is an amenable number.

1604220365 is a deficient number, since it is larger than the sum of its proper divisors (516246451).

1604220365 is a wasteful number, since it uses less digits than its factorization.

1604220365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283300.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1604220365 is about 40052.7198202569. The cubic root of 1604220365 is about 1170.6345609324.

The spelling of 1604220365 in words is "one billion, six hundred four million, two hundred twenty thousand, three hundred sixty-five".