987428988 has 288 divisors, whose sum is σ = 3317637120. Its totient is φ = 251475840.

The previous prime is 987428983. The next prime is 987429011. The reversal of 987428988 is 889824789.

It is a happy number.

It is a super-3 number, since 3×987428988³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987428983) 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 95 ways as a sum of consecutive naturals, for example, 2132445 + ... + 2132907.

Almost surely, 2^987428988 is an apocalyptic number.

987428988 is a gapful number since it is divisible by the number (98) 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 987428988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1658818560).

987428988 is an abundant number, since it is smaller than the sum of its proper divisors (2330208132).

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

987428988 is a wasteful number, since it uses less digits than its factorization.

987428988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 519 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 63.

The square root of 987428988 is about 31423.3828223506. The cubic root of 987428988 is about 995.7919800727.

The spelling of 987428988 in words is "nine hundred eighty-seven million, four hundred twenty-eight thousand, nine hundred eighty-eight".