987199056 has 80 divisors (see below), whose sum is σ = 2837377920. Its totient is φ = 328631040.

The previous prime is 987199049. The next prime is 987199097. The reversal of 987199056 is 650991789.

It is a super-2 number, since 2×987199056² = 1949123952334582272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 987198993 and 987199011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 639021 + ... + 640563.

It is an arithmetic number, because the mean of its divisors is an integer number (35467224).

Almost surely, 2^987199056 is an apocalyptic number.

It is an amenable number.

987199056 is an abundant number, since it is smaller than the sum of its proper divisors (1850178864).

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

987199056 is a wasteful number, since it uses less digits than its factorization.

987199056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041 (or 3029 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The square root of 987199056 is about 31419.7239962416. The cubic root of 987199056 is about 995.7146809390.

The spelling of 987199056 in words is "nine hundred eighty-seven million, one hundred ninety-nine thousand, fifty-six".