987055020 has 432 divisors, whose sum is σ = 3831740640. Its totient is φ = 204115968.

The previous prime is 987055019. The next prime is 987055021. The reversal of 987055020 is 20550789.

987055020 is a `hidden beast` number, since 9 + 87 + 0 + 550 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (987055019) and next prime (987055021).

It is a super-2 number, since 2×987055020² = 1948555225014400800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (987055021) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4348147 + ... + 4348373.

It is an arithmetic number, because the mean of its divisors is an integer number (8869770).

Almost surely, 2^987055020 is an apocalyptic number.

987055020 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 987055020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1915870320).

987055020 is an abundant number, since it is smaller than the sum of its proper divisors (2844685620).

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

987055020 is a wasteful number, since it uses less digits than its factorization.

987055020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 987055020 is about 31417.4317855550. The cubic root of 987055020 is about 995.6662524299. Note that the first 3 decimals are identical.

The spelling of 987055020 in words is "nine hundred eighty-seven million, fifty-five thousand, twenty".