1988531464 has 8 divisors (see below), whose sum is σ = 3728496510. Its totient is φ = 994265728.

The previous prime is 1988531459. The next prime is 1988531471. The reversal of 1988531464 is 4641358891.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1913362564 + 75168900 = 43742^2 + 8670^2 .

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

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, 124283209 + ... + 124283224.

Almost surely, 2^1988531464 is an apocalyptic number.

It is an amenable number.

1988531464 is a deficient number, since it is larger than the sum of its proper divisors (1739965046).

1988531464 is a wasteful number, since it uses less digits than its factorization.

1988531464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248566439 (or 248566435 counting only the distinct ones).

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

The square root of 1988531464 is about 44592.9530755701. The cubic root of 1988531464 is about 1257.5081903536.

The spelling of 1988531464 in words is "one billion, nine hundred eighty-eight million, five hundred thirty-one thousand, four hundred sixty-four".