1609458628 has 6 divisors (see below), whose sum is σ = 2816552606. Its totient is φ = 804729312.

The previous prime is 1609458623. The next prime is 1609458689. The reversal of 1609458628 is 8268549061.

It can be written as a sum of positive squares in only one way, i.e., 1044065344 + 565393284 = 32312^2 + 23778^2 .

It is not an unprimeable number, because it can be changed into a prime (1609458623) 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 as a sum of consecutive naturals, namely, 201182325 + ... + 201182332.

Almost surely, 2^1609458628 is an apocalyptic number.

It is an amenable number.

1609458628 is a deficient number, since it is larger than the sum of its proper divisors (1207093978).

1609458628 is a wasteful number, since it uses less digits than its factorization.

1609458628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402364661 (or 402364659 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 49.

The square root of 1609458628 is about 40118.0586270074. The cubic root of 1609458628 is about 1171.9073348286.

The spelling of 1609458628 in words is "one billion, six hundred nine million, four hundred fifty-eight thousand, six hundred twenty-eight".