1220880 has 40 divisors (see below), whose sum is σ = 3785472. Its totient is φ = 325504.

The previous prime is 1220839. The next prime is 1220893. The reversal of 1220880 is 880221.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2304 + ... + 2783.

2^1220880 is an apocalyptic number.

1220880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220880 is an abundant number, since it is smaller than the sum of its proper divisors (2564592).

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

1220880 is a wasteful number, since it uses less digits than its factorization.

1220880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5103 (or 5097 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 1220880 is about 1104.9343871923. The cubic root of 1220880 is about 106.8786582654.

The spelling of 1220880 in words is "one million, two hundred twenty thousand, eight hundred eighty".