1587972494 has 8 divisors (see below), whose sum is σ = 2417510568. Its totient is φ = 782135640.

The previous prime is 1587972487. The next prime is 1587972497. The reversal of 1587972494 is 4942797851.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1587972497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5925137 + ... + 5925404.

It is an arithmetic number, because the mean of its divisors is an integer number (302188821).

Almost surely, 2^1587972494 is an apocalyptic number.

1587972494 is a deficient number, since it is larger than the sum of its proper divisors (829538074).

1587972494 is a wasteful number, since it uses less digits than its factorization.

1587972494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11850610.

The product of its digits is 5080320, while the sum is 56.

The square root of 1587972494 is about 39849.3725672061. The cubic root of 1587972494 is about 1166.6690007935.

The spelling of 1587972494 in words is "one billion, five hundred eighty-seven million, nine hundred seventy-two thousand, four hundred ninety-four".