1487640005 has 18 divisors (see below), whose sum is σ = 1828941894. Its totient is φ = 1161616656.

The previous prime is 1487639963. The next prime is 1487640013. The reversal of 1487640005 is 5000467841.

It can be written as a sum of positive squares in only one way, i.e., 1190112004 + 297528001 = 34498^2 + 17249^2 .

It is not a de Polignac number, because 1487640005 - 2¹⁰ = 1487638981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4053332 + ... + 4053698.

It is an arithmetic number, because the mean of its divisors is an integer number (101607883).

Almost surely, 2^1487640005 is an apocalyptic number.

It is an amenable number.

1487640005 is a deficient number, since it is larger than the sum of its proper divisors (341301889).

1487640005 is an frugal number, since it uses more digits than its factorization.

1487640005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 1487640005 is about 38569.9365438939. The cubic root of 1487640005 is about 1141.5614196998.

The spelling of 1487640005 in words is "one billion, four hundred eighty-seven million, six hundred forty thousand, five".