1587157144 has 32 divisors (see below), whose sum is σ = 2998195200. Its totient is φ = 787656960.

The previous prime is 1587157139. The next prime is 1587157199. The reversal of 1587157144 is 4417517851.

It is a self number, because there is not a number n which added to its sum of digits gives 1587157144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1240297 + ... + 1241575.

It is an arithmetic number, because the mean of its divisors is an integer number (93693600).

Almost surely, 2^1587157144 is an apocalyptic number.

It is an amenable number.

1587157144 is a deficient number, since it is larger than the sum of its proper divisors (1411038056).

1587157144 is a wasteful number, since it uses less digits than its factorization.

1587157144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323 (or 2319 counting only the distinct ones).

The product of its digits is 156800, while the sum is 43.

The square root of 1587157144 is about 39839.1408541901. The cubic root of 1587157144 is about 1166.4692898568.

The spelling of 1587157144 in words is "one billion, five hundred eighty-seven million, one hundred fifty-seven thousand, one hundred forty-four".