990045180 has 72 divisors (see below), whose sum is σ = 3114379632. Its totient is φ = 264010752.

The previous prime is 990045169. The next prime is 990045187. The reversal of 990045180 is 81540099.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990045187) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 96997 + ... + 106716.

Almost surely, 2^990045180 is an apocalyptic number.

990045180 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

990045180 is an abundant number, since it is smaller than the sum of its proper divisors (2124334452).

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

990045180 is a wasteful number, since it uses less digits than its factorization.

990045180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203737 (or 203723 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 990045180 is about 31464.9833942432. The cubic root of 990045180 is about 996.6706544261.

The spelling of 990045180 in words is "nine hundred ninety million, forty-five thousand, one hundred eighty".