1887531664 has 10 divisors (see below), whose sum is σ = 3657092630. Its totient is φ = 943765824.

The previous prime is 1887531661. The next prime is 1887531677. The reversal of 1887531664 is 4661357881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1376410000 + 511121664 = 37100^2 + 22608^2 .

It is not an unprimeable number, because it can be changed into a prime (1887531661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58985349 + ... + 58985380.

It is an arithmetic number, because the mean of its divisors is an integer number (365709263).

Almost surely, 2^1887531664 is an apocalyptic number.

It is an amenable number.

1887531664 is a deficient number, since it is larger than the sum of its proper divisors (1769560966).

1887531664 is a wasteful number, since it uses less digits than its factorization.

1887531664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117970737 (or 117970731 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 1887531664 is about 43445.7324026192. The cubic root of 1887531664 is about 1235.8471164715.

The spelling of 1887531664 in words is "one billion, eight hundred eighty-seven million, five hundred thirty-one thousand, six hundred sixty-four".