1945280 has 28 divisors (see below), whose sum is σ = 4632960. Its totient is φ = 777984.

The previous prime is 1945261. The next prime is 1945297. The reversal of 1945280 is 825491.

It is a super-2 number, since 2×1945280² = 7568228556800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 5.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2720 + ... + 3359.

2^1945280 is an apocalyptic number.

1945280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1945280 is an abundant number, since it is smaller than the sum of its proper divisors (2687680).

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

1945280 is an equidigital number, since it uses as much as digits as its factorization.

1945280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6096 (or 6086 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1945280 is about 1394.7329493491. The cubic root of 1945280 is about 124.8324154237.

The spelling of 1945280 in words is "one million, nine hundred forty-five thousand, two hundred eighty".