2177280990 has 24 divisors (see below), whose sum is σ = 5660930808. Its totient is φ = 580608240.

The previous prime is 2177280961. The next prime is 2177281013. The reversal of 2177280990 is 990827712.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 11 ways as a sum of consecutive naturals, for example, 12095916 + ... + 12096095.

It is an arithmetic number, because the mean of its divisors is an integer number (235872117).

Almost surely, 2^2177280990 is an apocalyptic number.

2177280990 is an abundant number, since it is smaller than the sum of its proper divisors (3483649818).

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

2177280990 is a wasteful number, since it uses less digits than its factorization.

2177280990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24192024 (or 24192021 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 2177280990 is about 46661.3436368907. The cubic root of 2177280990 is about 1296.0989543499.

The spelling of 2177280990 in words is "two billion, one hundred seventy-seven million, two hundred eighty thousand, nine hundred ninety".