987097818 has 16 divisors (see below), whose sum is σ = 2256223680. Its totient is φ = 282027936.

The previous prime is 987097817. The next prime is 987097829. The reversal of 987097818 is 818790789.

It is a super-2 number, since 2×987097818² = 1948724204600722248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (987097817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11751123 + ... + 11751206.

It is an arithmetic number, because the mean of its divisors is an integer number (141013980).

Almost surely, 2^987097818 is an apocalyptic number.

987097818 is an abundant number, since it is smaller than the sum of its proper divisors (1269125862).

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

987097818 is a wasteful number, since it uses less digits than its factorization.

987097818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23502341.

The product of its (nonzero) digits is 2032128, while the sum is 57.

The square root of 987097818 is about 31418.1128968625. The cubic root of 987097818 is about 995.6806426809.

The spelling of 987097818 in words is "nine hundred eighty-seven million, ninety-seven thousand, eight hundred eighteen".