1587171404 has 48 divisors (see below), whose sum is σ = 3440420928. Its totient is φ = 623870208.

The previous prime is 1587171379. The next prime is 1587171427. The reversal of 1587171404 is 4041717851.

It is a super-2 number, since 2×1587171404² = 5038226131350662432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43262 + ... + 71034.

It is an arithmetic number, because the mean of its divisors is an integer number (71675436).

Almost surely, 2^1587171404 is an apocalyptic number.

1587171404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1587171404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1720210464).

1587171404 is an abundant number, since it is smaller than the sum of its proper divisors (1853249524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1587171404 is a wasteful number, since it uses less digits than its factorization.

1587171404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27954 (or 27952 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 1587171404 is about 39839.3198235110. The cubic root of 1587171404 is about 1166.4727832732.

The spelling of 1587171404 in words is "one billion, five hundred eighty-seven million, one hundred seventy-one thousand, four hundred four".