1587199490 has 16 divisors (see below), whose sum is σ = 2868818040. Its totient is φ = 632244480.

The previous prime is 1587199379. The next prime is 1587199499. The reversal of 1587199490 is 949917851.

It can be written as a sum of positive squares in 4 ways, for example, as 1133466889 + 453732601 = 33667^2 + 21301^2 .

It is not an unprimeable number, because it can be changed into a prime (1587199499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326885 + ... + 331704.

Almost surely, 2^1587199490 is an apocalyptic number.

1587199490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1587199490 is a deficient number, since it is larger than the sum of its proper divisors (1281618550).

1587199490 is a wasteful number, since it uses less digits than its factorization.

1587199490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658837.

The product of its (nonzero) digits is 816480, while the sum is 53.

The square root of 1587199490 is about 39839.6723129094. The cubic root of 1587199490 is about 1166.4796637234.

The spelling of 1587199490 in words is "one billion, five hundred eighty-seven million, one hundred ninety-nine thousand, four hundred ninety".