1788073668 has 36 divisors (see below), whose sum is σ = 4785728220. Its totient is φ = 560964096.

The previous prime is 1788073649. The next prime is 1788073669. The reversal of 1788073668 is 8663708871.

It can be written as a sum of positive squares in 2 ways, for example, as 625400064 + 1162673604 = 25008^2 + 34098^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1788073669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1460233 + ... + 1461456.

It is an arithmetic number, because the mean of its divisors is an integer number (132936895).

Almost surely, 2^1788073668 is an apocalyptic number.

1788073668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1788073668 is an abundant number, since it is smaller than the sum of its proper divisors (2997654552).

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

1788073668 is a wasteful number, since it uses less digits than its factorization.

1788073668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2921716 (or 2921711 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The square root of 1788073668 is about 42285.6201089685. The cubic root of 1788073668 is about 1213.7478376556.

The spelling of 1788073668 in words is "one billion, seven hundred eighty-eight million, seventy-three thousand, six hundred sixty-eight".