1587904 has 28 divisors (see below), whose sum is σ = 3229864. Its totient is φ = 774144.

The previous prime is 1587899. The next prime is 1587917. The reversal of 1587904 is 4097851.

It is a happy number.

1587904 is nontrivially palindromic in base 5.

It is a super-2 number, since 2×1587904² = 5042878226432, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1587904.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2464 + ... + 3040.

2^1587904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1587904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1614932).

1587904 is an abundant number, since it is smaller than the sum of its proper divisors (1641960).

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

1587904 is an equidigital number, since it uses as much as digits as its factorization.

1587904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1587904 is about 1260.1206291463. The cubic root of 1587904 is about 116.6652226579.

The spelling of 1587904 in words is "one million, five hundred eighty-seven thousand, nine hundred four".