987185380 has 24 divisors (see below), whose sum is σ = 2078879040. Its totient is φ = 393771360.

The previous prime is 987185377. The next prime is 987185383. The reversal of 987185380 is 83581789.

987185380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (987185377) and next prime (987185383).

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (987185383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61566 + ... + 75925.

It is an arithmetic number, because the mean of its divisors is an integer number (86619960).

Almost surely, 2^987185380 is an apocalyptic number.

It is an amenable number.

987185380 is an abundant number, since it is smaller than the sum of its proper divisors (1091693660).

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

987185380 is a wasteful number, since it uses less digits than its factorization.

987185380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137859 (or 137857 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 49.

The square root of 987185380 is about 31419.5063614946. The cubic root of 987185380 is about 995.7100829279.

The spelling of 987185380 in words is "nine hundred eighty-seven million, one hundred eighty-five thousand, three hundred eighty".