1987508 has 6 divisors (see below), whose sum is σ = 3478146. Its totient is φ = 993752.

The previous prime is 1987501. The next prime is 1987519. The reversal of 1987508 is 8057891.

It can be written as a sum of positive squares in only one way, i.e., 1965604 + 21904 = 1402^2 + 148^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248435 + ... + 248442.

It is an arithmetic number, because the mean of its divisors is an integer number (579691).

2^1987508 is an apocalyptic number.

It is an amenable number.

1987508 is a deficient number, since it is larger than the sum of its proper divisors (1490638).

1987508 is a wasteful number, since it uses less digits than its factorization.

1987508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496881 (or 496879 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 1987508 is about 1409.7900552919. The cubic root of 1987508 is about 125.7292413829.

The spelling of 1987508 in words is "one million, nine hundred eighty-seven thousand, five hundred eight".