1604691434 has 8 divisors (see below), whose sum is σ = 2430869508. Its totient is φ = 794401600.

The previous prime is 1604691433. The next prime is 1604691457. The reversal of 1604691434 is 4341964061.

It can be written as a sum of positive squares in 2 ways, for example, as 1027010209 + 577681225 = 32047^2 + 24035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1604691433) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3971807 + ... + 3972210.

Almost surely, 2^1604691434 is an apocalyptic number.

1604691434 is a deficient number, since it is larger than the sum of its proper divisors (826178074).

1604691434 is a wasteful number, since it uses less digits than its factorization.

1604691434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7944120.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 1604691434 is about 40058.6000004993. The cubic root of 1604691434 is about 1170.7491328238.

The spelling of 1604691434 in words is "one billion, six hundred four million, six hundred ninety-one thousand, four hundred thirty-four".