1780000145 has 24 divisors (see below), whose sum is σ = 2683246272. Its totient is φ = 1109607840.

The previous prime is 1780000133. The next prime is 1780000151. The reversal of 1780000145 is 5410000871.

It is not a de Polignac number, because 1780000145 - 2⁶ = 1780000081 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205919 + ... + 214388.

It is an arithmetic number, because the mean of its divisors is an integer number (111801928).

Almost surely, 2^1780000145 is an apocalyptic number.

It is an amenable number.

1780000145 is a deficient number, since it is larger than the sum of its proper divisors (903246127).

1780000145 is a wasteful number, since it uses less digits than its factorization.

1780000145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420341 (or 420330 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 1780000145 is about 42190.0479378727. The cubic root of 1780000145 is about 1211.9183070139.

The spelling of 1780000145 in words is "one billion, seven hundred eighty million, one hundred forty-five", and thus it is an aban number.