1987090910 has 64 divisors (see below), whose sum is σ = 4202385408. Its totient is φ = 662373504.

The previous prime is 1987090909. The next prime is 1987090961. The reversal of 1987090910 is 190907891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 514607 + ... + 518453.

It is an arithmetic number, because the mean of its divisors is an integer number (65662272).

Almost surely, 2^1987090910 is an apocalyptic number.

1987090910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1987090910 is an abundant number, since it is smaller than the sum of its proper divisors (2215294498).

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

1987090910 is a wasteful number, since it uses less digits than its factorization.

1987090910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 1987090910 is about 44576.7978885877. The cubic root of 1987090910 is about 1257.2044576577.

The spelling of 1987090910 in words is "one billion, nine hundred eighty-seven million, ninety thousand, nine hundred ten".