1780480897 has 8 divisors (see below), whose sum is σ = 1983560040. Its totient is φ = 1586847360.

The previous prime is 1780480831. The next prime is 1780480913. The reversal of 1780480897 is 7980840871.

It can be written as a sum of positive squares in 4 ways, for example, as 320553216 + 1459927681 = 17904^2 + 38209^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1780480897 - 2¹⁵ = 1780448129 is a prime.

It is a super-2 number, since 2×1780480897² = 6340224449163849218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1780480697) 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, 2361004 + ... + 2361757.

It is an arithmetic number, because the mean of its divisors is an integer number (247945005).

Almost surely, 2^1780480897 is an apocalyptic number.

It is an amenable number.

1780480897 is a deficient number, since it is larger than the sum of its proper divisors (203079143).

1780480897 is a wasteful number, since it uses less digits than its factorization.

1780480897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4722803.

The product of its (nonzero) digits is 903168, while the sum is 52.

The square root of 1780480897 is about 42195.7450106050. The cubic root of 1780480897 is about 1212.0274043280.

The spelling of 1780480897 in words is "one billion, seven hundred eighty million, four hundred eighty thousand, eight hundred ninety-seven".