987149240 has 128 divisors (see below), whose sum is σ = 2804889600. Its totient is φ = 303713280.

The previous prime is 987149239. The next prime is 987149263. The reversal of 987149240 is 42941789.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 987149191 and 987149200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241292 + ... + 245348.

It is an arithmetic number, because the mean of its divisors is an integer number (21913200).

Almost surely, 2^987149240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 987149240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1402444800).

987149240 is an abundant number, since it is smaller than the sum of its proper divisors (1817740360).

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

987149240 is a wasteful number, since it uses less digits than its factorization.

987149240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4165 (or 4161 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 987149240 is about 31418.9312358011. The cubic root of 987149240 is about 995.6979320856.

The spelling of 987149240 in words is "nine hundred eighty-seven million, one hundred forty-nine thousand, two hundred forty".