1830145778 has 16 divisors (see below), whose sum is σ = 3059687520. Its totient is φ = 815916096.

The previous prime is 1830145777. The next prime is 1830145781. The reversal of 1830145778 is 8775410381.

It is not an unprimeable number, because it can be changed into a prime (1830145777) 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, 1415876 + ... + 1417167.

It is an arithmetic number, because the mean of its divisors is an integer number (191230470).

Almost surely, 2^1830145778 is an apocalyptic number.

1830145778 is a deficient number, since it is larger than the sum of its proper divisors (1229541742).

1830145778 is a wasteful number, since it uses less digits than its factorization.

1830145778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833081.

The product of its (nonzero) digits is 188160, while the sum is 44.

The square root of 1830145778 is about 42780.2031084473. The cubic root of 1830145778 is about 1223.1936788823.

The spelling of 1830145778 in words is "one billion, eight hundred thirty million, one hundred forty-five thousand, seven hundred seventy-eight".