987654320 has 40 divisors (see below), whose sum is σ = 2358365424. Its totient is φ = 384383232.

The previous prime is 987654319. The next prime is 987654323. The reversal of 987654320 is 23456789.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×987654320² = 1950922111629324800, which contains 22 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (987654323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163874 + ... + 169793.

Almost surely, 2^987654320 is an apocalyptic number.

It is an amenable number.

987654320 is an abundant number, since it is smaller than the sum of its proper divisors (1370711104).

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

987654320 is a wasteful number, since it uses less digits than its factorization.

987654320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333717 (or 333711 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 987654320 is about 31426.9680370220. The cubic root of 987654320 is about 995.8677211252.

The spelling of 987654320 in words is "nine hundred eighty-seven million, six hundred fifty-four thousand, three hundred twenty".