1780425128 has 16 divisors (see below), whose sum is σ = 3339221760. Its totient is φ = 889966000.

The previous prime is 1780425121. The next prime is 1780425151. The reversal of 1780425128 is 8215240871.

It is a junction number, because it is equal to n+sod(n) for n = 1780425091 and 1780425100.

It is not an unprimeable number, because it can be changed into a prime (1780425121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1913 + ... + 59703.

It is an arithmetic number, because the mean of its divisors is an integer number (208701360).

Almost surely, 2^1780425128 is an apocalyptic number.

It is an amenable number.

1780425128 is a deficient number, since it is larger than the sum of its proper divisors (1558796632).

1780425128 is a wasteful number, since it uses less digits than its factorization.

1780425128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61648 (or 61644 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 1780425128 is about 42195.0841686564. The cubic root of 1780425128 is about 1212.0147496453.

Adding to 1780425128 its reverse (8215240871), we get a palindrome (9995665999).

The spelling of 1780425128 in words is "one billion, seven hundred eighty million, four hundred twenty-five thousand, one hundred twenty-eight".