987228879840 has 432 divisors, whose sum is σ = 3922089050880. Its totient is φ = 225471375360.

The previous prime is 987228879811. The next prime is 987228879859. The reversal of 987228879840 is 48978822789.

It is a super-2 number, since 2×987228879840² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 100825345 + ... + 100835135.

It is an arithmetic number, because the mean of its divisors is an integer number (9078909840).

Almost surely, 2^987228879840 is an apocalyptic number.

987228879840 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 987228879840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1961044525440).

987228879840 is an abundant number, since it is smaller than the sum of its proper divisors (2934860171040).

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

987228879840 is a wasteful number, since it uses less digits than its factorization.

987228879840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11255 (or 11237 counting only the distinct ones).

The product of its (nonzero) digits is 260112384, while the sum is 72.

The spelling of 987228879840 in words is "nine hundred eighty-seven billion, two hundred twenty-eight million, eight hundred seventy-nine thousand, eight hundred forty".