1590640648 has 8 divisors (see below), whose sum is σ = 2982451230. Its totient is φ = 795320320.

The previous prime is 1590640627. The next prime is 1590640657. The reversal of 1590640648 is 8460460951.

It can be written as a sum of positive squares in only one way, i.e., 1584199204 + 6441444 = 39802^2 + 2538^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×1590640648³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99415033 + ... + 99415048.

Almost surely, 2^1590640648 is an apocalyptic number.

It is an amenable number.

1590640648 is a deficient number, since it is larger than the sum of its proper divisors (1391810582).

1590640648 is a wasteful number, since it uses less digits than its factorization.

1590640648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198830087 (or 198830083 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 1590640648 is about 39882.8365089546. The cubic root of 1590640648 is about 1167.3220580233.

The spelling of 1590640648 in words is "one billion, five hundred ninety million, six hundred forty thousand, six hundred forty-eight".